"Mysterious Smoak"

Disclaimer: I don't own the characters; those belong to their original creators. The way it's all stringed together is of my making. No profit is being made out of this (*sigh* unfortunately).

Manipulations of the cover art/image are mine though.


While the chapters in this story can be seen as separate entries, they all have the same backstory in common. Think of it as each chapter being a "what if" moment for the characters yet with all chapters sharing the same backstory.

Backstory:
- Felicity meets the Winchesters in 2012 (reality; 2011-2012 / verse; 2012-2013) = S9 (verse; 2015-2016)
- Timeline of "Arrow" is pushed forward by 2 years so the ages are the same (therefore Oliver was shipwrecked in 2009 and saved in 2014) = S2 (2015-2016)

Ages: (see first chapter)


REASON why this is listed under "Arrow" only: because of Felicity.


Chapter Summary: [Tag on to 2x19] When the team find Slade waiting for them in the Foundry, it's clear that it's all or nothing for the team. With that in mind, Felicity takes a risk and makes a call that could be a game changer.
Inspiration: This came to mind immediately after I saw the webclip for the episode (before the episode aired).

Spoiler(s): everything up to ep. 9x17 ("Mother's Little Helper") for Supernatural and everything up to ep. 2x19 ("The Man Under the Hood") for Arrow
Time Frame: This is an altered continuation of the 'Slade in the Foundry' scene.

A/N: At the end to avoid additional spoilers. Not beta-ed.

NOTE: This chapter is no way connected to the previous chapters.


*SPN*Arrow*SPN*Arrow*SPN*


"Plan C"

"I know Slade." Oliver declared as he and his team descended down the Foundry's stairs. "He's not going to stop to-"

"Welcome home." A menacing voice interrupted Oliver, causing all four team members to stop in their tracks.

Their eyes tracked up and zeroed in on Slade who was completely decked out in his Deathstroke uniform as he stood in the middle of the room. There was no scrap of skin seen. He was completely covered in armor of some kind.

Oh crap, Felicity thought to herself before she noticed the gun he was aiming at them.

Before she realized it, shots were being fired at them.

It was frantic movements between the four of them.

Oliver immediately grabbed Felicity around the waist and jumped over the railing. Once they landed, he quickly pushed her to take cover underneath the metal staircase with him as her human shield.

Slade continued to fire as Sara rushed to take cover behind a pillar. Whenever he could, Diggle returned fire on Slade as he made his way across the Foundry to the power box. Once there, he cut the power to their hideout, causing a darkness to consume them.

Oliver stayed by Felicity's side as Sara made a move to attack Slade from behind with a metal bar (from the salmon ladder). It didn't do much as he grabbed her by the throat.

Felicity squeaked before she started to fumble through her pockets for her phone. She quickly taped into her speed dial before she raised the device to her ear.

"What are you doing?" Oliver hissed at her before he shouted for Diggle to stay away from Slade; Diggle was advancing on Slade whiling firing off his shots after Sara had been tossed aside like a rag doll.

"Going with Plan C," Felicity rushed before her call was picked up. "Cas! It's Felicity, I need your help!"

"Felicity? What's wrong?" While he wasn't an expert on emotions, he could instantly pick up the distress and fear in her voice.

"He's here. Slade's here and he's going to kill us." She rushed to explain just before Oliver released an enraged yell before he flew forward to get into the fight.

Diggle and Sara were down. Oliver was the last man standing on their team.

Oh god.

Felicity gulped at the thought, "I know you have more pressing things to deal with but please Castiel, I'm begging you. Help me."

"I can't just pop in like I used to Felicity. I'm grounded, I'd never make it in time." And he regretted saying that to her because he truly wanted to help her. During the few times he's met her, he remembered that she was a compassionate woman that strived to do what was right for the greater good. She was the rock that held the Winchesters together from what he could remember and because of that he wanted to help but with all his power, he just wouldn't get to her in time. Not like he used to.

"Then use me." Felicity frantically insisted as she watched Oliver and Slade fighting it out. "I give you temporary permission to use me Cas, that's why I'm calling…to give you permission." She stressed out before a shout from Oliver was heard. "Please!" She never wanted to give such a thing a try (there were extreme risks to her request) but she was desperate.

He sighed, "Very well."

The dial tone was heard a second later.

*SPN*Arrow*SPN*Arrow*SPN*

Before Slade could knock Oliver unconscious, the Foundry was bathed in a blinding light that came from beneath the door. Slade had to close his one eye due to the brightness, yet in doing so he was unable to see the blinding light make its way towards Felicity before it pushed itself into her through her mouth.

When Slade uncovered his eye again, straightened himself up and grabbed his sword, he was surprised to see Felicity Smoak standing in front of him. Her back was straight, her legs were shoulder-width apart and her head was tilted to the side a bit as she held an odd looking silver blade in her hand.

Slade chuckled at the side before him. "Do you want to go for a round yourself Ms. Smoak? It won't be much of a fair fight, mind you."

From his pained position on the floor, Oliver shifted and saw just who Slade was talking to. "Felicity, don't." He grumbled as he tried to force the pain from his sliced shoulder from his mind.

But Felicity never reacted to Oliver. Her eyes were trained on Slade, she even blinked a few times as if she wasn't just threatened by the man with the Mirakuru in him.

"No it won't." Felicity commented with a flat tone as she stared the man down, "But I can assure you Mr. Wilson, only one of us is leaving this basement alive." Her voice was leveled and controlled with no trace of fear that was present in it moments before. It was something Oliver found odd from his place on the ground but he didn't say anything. He couldn't do much in his state. His only saving grace for being alive right now was because Slade wanted him to suffer before he died and dying now wouldn't do it for his former mentor.

From behind his mask, Slade smirked, "My thoughts exactly."

He didn't hesitate to swing his sword out in an attack, only to have it clash with her odd silver blade. With every swing he made at her, she blocked it with ease. It unnerved him to see that as this continued on between them, she wasn't struggling in any way, there was no exhaustion taking over her. She continued to meet every one of his attacks without any strain on herself. This infuriated him even more. He wasn't expecting this. His research showed that she wasn't much of a fighter.

As the fight continued around him, Oliver struggled to prop himself up yet he could only manage to get himself to sit up and lean against her computer station. From this low vantage point, he tried to see the fight before him yet the darkness prevented that. Instead he only had the clash of metal against metal as any indicator as to how the fight was going.

By the time his eyes readjusted to the darkness again, he focused in on the fight just when Slade stabbed his sword into Felicity's abdomen. Her back was to him yet the position of the fighters and the sounds with it gave way to what just happened.

Oliver gave an anguished shout at the sight in front of him. She wasn't supposed to be fighting. She wasn't supposed to get hurt. She wasn't supposed to die for him!

As the pain of losing her was slowly making him numb, he expected Slade to make a taunt about how he was the one to kill her, not the man who held the sword. Yet the taunt never came.

And behind the mask, Oliver could never see the confused expression on Slade's face as he held the sword inside Felicity and yet she didn't budge, she didn't react. It was like the sword wasn't inside her.

She tilted her head to the side as she look up at the man in the mask, "Was that supposed to hurt?" She deadpanned as she blinked up at him. Cold eyes stared back at the masked man.

Slade's eye widened at the statement, frozen by the mere fact that this woman wasn't reacting to the wound in any way. Even with the Mirakuru, he knew that a wound like that would momentarily incapacitate him if the situation were reversed.

As he contemplated the oddity of the situation, he didn't realize that she had gripped his sword hand and twisted it, breaking his wrist in the process before she stabbed him with her blade into his chest, just below his Kevlar chest plate. The blade sliced through the protective material and imbedded itself into his chest cavity. He gasped at the feeling and stumbled back a bit.

Felicity took the opportunity to take the sword out of her body before she slowly advanced on him.

"Like I said, only one of us is walking out of here Mr. Wilson and it won't be you." She firmly declared before she placed a hand on his mask.

Before Slade got a chance to react, a bright light emitted from behind his mask, causing the man to scream out in pain as every organ in his body bubbled at the intense heat it was under. The moment the bright light disappeared was when the screams ended. It was the moment when all of the man's insides were fried. Not even the special serum in his veins could heal him now. The armored man collapsed to the ground as smoke tried to escape from behind his mask.

The woman towered over the dead man with a tilted head once again, as if doing so could give her all the answers she sought out in that penetrating stare of hers. "Such corruption, it's a shame really." She declared before she kneeled down.

And when the lights were turned back on by a limping Sara (who had awoken after the blinding light display), Felicity's form was found hovering over Slade's body before she pulled the blade from his corpse. She straightened up and walked a few steps to a table that had a worn out rag. She picked it up and wiped the blood from the blade while taking no notice of the two sets of eyes focused on her.

Sara slowly limped towards the center of the room as she pressed her fractured wrist to her stomach. Her eyes shifted between Felicity and Slade.

"Is he…?" She trailed off as she looked to Oliver for a confirmation but his eyes were tracking Felicity.

The image of Felicity getting stabbed in the stomach was still fresh in his mind. When the lights had turned back on, Oliver's eyes immediately moved to the sword with high hopes that maybe the pain in his shoulder was making him see things but when he saw the fresh blood (and there was too much of it to just come from his shoulder wound), he quickly fixed his gaze back onto Felicity as she moved around without any signs of her being injured.

"Mr. Wilson will no longer be a problem for you and your team." Felicity responded with her back turned towards the two vigilantes. The monotone of her voice reminded Oliver that something was off. "Unfortunately, I couldn't help in regards to who was helping him in his crusade against you." She finished wiping all traces of the blood off the blade before she set the two down onto the table; it wasn't where the blade was originally hidden but he'd let Felicity deal with that later (he was just glad that he sensed the blade in the lair after arriving). "She only wanted him dead so that he couldn't cause any more harm. Extracting information from him only crossed her mind after I killed him." She explained before she turned around and headed straight for Oliver.

Oliver couldn't help but tense as Felicity approached him. For some odd reason, his instincts were telling him that this woman wasn't Felicity. Yet how would that be possible?

She crouched down beside him only to tilt her head again, "She's insisting that I heal you before I go."

"She? What she?" Sara questioned as she slowly approached Oliver and Felicity. She was still confused about everything.

Oliver looked at Felicity and saw that her blue eyes were a darker shade, almost black if he really thought about it as opposed to the light blue they usually were. But when he looked into her eyes, he didn't get the same feeling as he normally did. He didn't feel at ease, he didn't feel comfort, he didn't feel any trust or love of any kind from her…he felt no connection towards her.

"Who are you?" He whispered to the being posing as Felicity.

Sara gave her boyfriend an incredulous look, "Ollie, what are you talking about? How badly did you hit your head?"

"My name is Castiel but my friends call me Cas." The faux-Felicity introduced with a small smile, completely ignoring Sara's earlier interruption. He seemed pleased that Oliver could tell that something was off (if the fight wasn't enough of an indicator).

Oliver's eyes widened, "You were Plan C."

Castiel nodded, "She didn't want to have to resort to this but we must do things in times of war that we wouldn't normally do." Unknown to the humans, Castiel was thinking back to all that he had to do since he returned to Earth after raising Dean Winchester from Hell.

Oliver's eyes hardened at the mention of war, "Where is she?"

Castiel looked down at Felicity's body, completely ignoring the blood soaked shirt he now wore, "She's inside, resting. I'm just temporarily using her body as a vessel."

"A vessel?"

Castiel nodded, "Yes, with her permission of course. Without it, well I would not have been able to take control of her. She knew that."

"She knew?" Oliver knew that he should be saying more, asking more, but the whole evening was starting to overwhelm him to the point that the pain in his shoulder was starting to creep back into his conscious thought once again. The one thing that did stick was that Felicity knew the risks in making the call and yet she did it anyways.

"Yes. For some time now." Castiel tilted his head to the side again, his eyes shifting between Oliver and his wounded shoulder. "May I heal your wound now? I'll only be able to heal the internal wounds and any that have scarred over after you tended to them down here. I would heal all your scars from your time on the island but that would raise too many questions since many have seen them since your return, have they not?" He explained swiftly yet his tone never showed any concern like Felicity's voice normally would in similar situations.

However Oliver couldn't help but wonder if the rambling was something Castiel was picking up from Felicity since he was temporarily using her body or if the rambling was his quirk as well. He was still trying to process the idea of Felicity being possessed right now…with her consent no less. Who does that, let alone know that stuff?

Oliver exhaled before wincing as he clutched his arm to stop it from moving, "Do what you can." He was skeptical that Castiel could heal his wounds like he claimed that he was able to do.

"I could do the same for you Ms. Lance if you want." Castiel offered before he placed two fingers to Oliver's forehead. In a blink of an eye, Oliver felt refreshed, clear-headed and no ounce of physical pain when moments before that was all he felt, the pain that resonated through his own body. His glaze quickly turned to his wounded shoulder only to find that he could move and rotate it with ease. Even the quick movement of his head didn't case a headache to occur after the punches that Slade had landed on his head. He felt like he did before they entered the Foundry…possibly even better. Oliver looked up and gave Sara a wide-eyed look before he shifted to look at Castiel.

Sara gulped, "Oh, um, okay." She agreed after taking in Oliver's reaction to Castiel's healing touch. She would do anything to avoid a trip to the hospital.

Castiel nodded before he stood and walked towards Sara. He placed two fingers to her forehead for a moment or two before he moved away from her. It was Sara's turned to have a wide-eyed look as she tested out her healed limbs while Castiel made his way towards an unconscious Diggle who was still surrounded by broken glass.

Instead of healing him on the spot, Castiel bent down and picked Diggle up as if he weighed nothing to him. Both vigilantes stared in shock at the display because to them, it still looked like it was Felicity that was carrying Diggle to a no-glass-zone…Felicity's computer chair. Once settled, Castiel placed two fingers to Diggle's forehead but when he finished, Diggle didn't wake up despite his new wounds being all healed. Castiel wasn't worried though; he figured that the human would wake up in a few moments.

Before Castiel could dwell on the predicament for much longer, Oliver spoke up after he stood up, "Why help us?"

Castiel turned his head and was somewhat thankful for the distance between him and Oliver, with the billionaire standing that left Castiel to be the shorter one between them. "Like I said, I know Felicity and for a human, she's got a solid judge of character. She wouldn't have risked her life and made her call to me if she didn't believe in those she was trying to save." He declared and when Sara moved to watch over Diggle, Castiel moved to approach Oliver. He wanted a bit of privacy between himself and the human before him; he just felt Felicity's need to close the distance deep within her vessel. It wasn't the only thing that Castiel was feeling from his current vessel, "And even right now I can feel how much she truly believes in you Mr. Queen."

Oliver tilted his gaze as he looked down at Castiel. It was weird to see Felicity's face and yet behind that held a powerful being that not only stopped Slade but had also healed them of any evidence of Slade's visit to them. But when he looked into Felicity's eyes, Castiel's specific wording came back to him.

"For a human?"

Castiel smirked up at the human, "Surely you must realize Mr. Queen that I'm not exactly human."

Oliver gulped, he had suspected yet he didn't want to be true, "Then what are you?"

"I'm an angel of the lord and I've served my purpose here. I have a war of my own that I need to get back to." He sighed at the thought of what awaited him before he focused back on Oliver. "Tell Felicity to call Dean when she wakes up. She won't remember this, not at first."

Oliver's brow scrunched up at the mention of the new name, "Dean?"

Castiel nodded, "She knows who he is. Now you might want to get ready to catch her in a few moments." He answered as he invaded Oliver's personal space. The angel didn't want Felicity to slump to the floor after his departure. She may have been healed from all her wounds but falling on the ground would still hurt her once she woke up. The angel even ignored the little protests from within his vessel as he invaded the vigilante's space.

Oliver's eyes widened, "What?" He wanted to take a step back from the powerful being but the new grip on his arms stopped him. When he looked down and saw that Felicity's hands were stopping his retreat, it took a moment for him to realize that while it was Felicity's hand that was touching his arms, it was Castiel's strength that was keeping him in place. He took that as a sign to obey the angel.

"And shut your eyes." Castiel advised a bit loudly with a squeeze of assurance to his arms. "It's been a pleasure to finally meet you Oliver Queen. You've come a long way." Castiel declared lowly before a dull light started to emit from Felicity's body.

Oliver and Sara quickly closed their eyes before the intensity of the light increased to a blinding level. A slight ringing in their ears was heard before a gasp came from Felicity's body.

Once the unnatural light disappeared from the room, Felicity's body went limp. When feeling her body sag, Oliver didn't hesitate in tightening his hold around her and bring her into his body while silently thanking Castiel for his previously confusing warning.

When Felicity was secure against him, Oliver moved his hand around so that he could check her pulse. When he was relieved by the strong rhythm he was picking up, his hand started trailing down her body until it hovered over the darkened material of her jacket. He knew that his hands shouldn't be wandering but he needed to know. His fingers ran over the fabric that covered her midsection but when they came across the clear slit in the fabric, his fingers stilled. He hadn't been seeing things. Felicity was stabbed by Slade's sword…or was it Castiel…did Felicity feel it? He felt this urge to just check the bare entry wound himself to see if she was healed too or not but that would cross a line. Wouldn't it?

Before he could cross the line, a loud groan caught his attention. He turned his head and saw Diggle coming around while Sara stood beside him to make sure his grogginess didn't get him to slide out of the chair.

"What the hell happened?" Diggle grumbled as he lifted his head while rubbing at his eyes.

When he finally opened them and saw the destruction of the Foundry, confusion flooded his system for a moment before the memories came back to him. He quickly looked to the shattered glass casing before he looked down at himself to check for any wounds. He was surprised to find none. His surprise only grew when his eyes finally landed on Slade's dead body.

Sara sighed, "That's what I would like to know." She patted Diggle on the back while she looked at Oliver, or more specifically when she looked at Felicity.

Oliver followed Sara's eyes and looked down at the unconscious girl leaning against him while his arms were around her.

"You aren't the only one."He mumbled as many questions started formulating in his mind.

The first one being how (and when) did Felicity befriend an actual angel?


*SPN*Arrow*SPN*Arrow*SPN*


Angel Possession Clarification: In my mind, Castiel's original vessel (Jimmy Novak) is solely his own so when he left it to possess Felicity, he was able to freely return to the body of Jimmy without another permission. I figured since Castiel was able to be turned into a human while in Jimmy's body then Jimmy must not be 'home' anymore. Also when an angel possesses a human, they have access to all the human's memories (and emotions) yet the human has no access to the angel's memories. After the angel leaves, the human may remember the time when they were possessed but they really have to focus on remembering it otherwise they draw a blank.

When did Castiel meet Felicity?
In my head, I have her meeting him when he was "Crazy Castiel" (end of SPN Season 7).


A/N #1: There you go! I didn't mean for it to get this long! So in my mind, I figured that Felicity would only want to merge her two worlds together if it was the absolute last resort she had and Slade showing up like he did, she deemed that moment as a 'do or die' type scenario, hence the call. I hope it was plausible. And as for Castiel, this happened before 9x18 so he hasn't had any face time with Metatron yet. Did it work for you guys? Did you like it/hate it? Believable/Ridiculous? Please leave a review!

A/N #2: Once again, your response to this collection has astounded me. I'm truly amazed and very appreciative of you guys. Thank you so much for all the hits and reviews! The positive response is just lightening up my spirits very much during this end-semester-crunch-time! I'm a little saddened that I lost some reviewers and I can't help but wonder why that was.

A/N #3: Just on a personal note, I'm so sorry for my absence for the last month. I'm currently in the middle of final exams so the last month has been spent either doing last minute term evaluations or studying for the exams. But I do have 3 tag-on ideas (2x17, two for 2x18) as well as a 'wacky' showdown in the works. So please stay tune for those!


Originally Published: April 16, 2014