Before the long talk, they sat on a long table. This place looked luxurious and royal. It was probably Royal family's mansion. Tom told Percy about why he had a face like that and what had he done in the past. Percy was terrified about those things that Tom had done but he couldn't hate his half-brother. Now Percy was think about himself killing monster in the past. How terrible had him been? If the role was switched, he wouldn't know what could he become. How agony was that, to be in Tartarus every time you were killed. Even with one travel, Percy almost went crazy. But the monsters had gone through that almost million times already. No doubt that most of them were insane.

Tom had revealed his plan about eliminating those wizards and witches who weren't pure blood and the Potter boy had to be killed. Tom had offered Percy a place in his army and Percy was hesitated to decide.

"As long as you don't go messing with Mythology worlds. I can help you with that but I'm not a killing type" Percy knew he made a bad decision but he had learned to be selfish and Tom was his demigod brother after all.

"Let's make an unbreakable vows" Tom suggested "If one of us broke the vow, both of us died"

"Okay. But we are to swear it on Styx river too" Percy said "It's only fair like this"

"Fair enough"

They made an unbreakable vows to themselves, that Percy would give Tom helps every time he was needed, but no killing, and Tom was to not mess with Mythical worlds. Also they made a vows to the Styx.

"We're not taking any move now, you can do whatever you want" Tom said. Percy nodded and looked at Tom up and down, wondering why hadn't he killed Harry already, he was a son of the God of sea!

"Hey wait. Do you have demigod power? Because I can feel only faint amount of it radiating from you" Percy asked.

"I have to choose one choice" Tom replied "Wizard or Demigod. And I chose Wizard"

Percy was still a bit confused but he didn't ask further. He wondered if Poseidon had ever visited Tom before, because Tom old him that he used to be in an Orphanage and never knew who his parents were. Percy took a pity of his brother. He must be so lonely and hopeless that he chose the wrong path of his life.

Tom walked away to somewhere else, leaving Percy in a room alone. Percy went to find a place where he could make rainbow and he eventually found it. He was in the back of the manor and there was an old fountain but there was still water and there was sunlight. He grabbed a coin from he pocket and tossed it into the fountain "Oh Iris, Goddess of Rainbow, please do me a favor and show me Poseidon, Atlantis"

The mist formed and there was Poseidon, sitting on a throne, tapping a tablet...underwater "Dad?" Percy called.

Poseidon looked up and saw Percy "Percy" He said "I'm glad you called, so what's the problem?"

Percy cleared his throat "Today, I met another Demigod. He told me that he was also a wizard" Percy said.

"The wizarding world. Hecate's pet world. She blessed some mortals centuries ago and they continued their blessing through the magic they put in this world" Poseidon said and Percy nodded.

"Also. He told me that he was your son" Percy said.

"Can I have a name"

"Tom Riddle was his name. And he was known as a dark lord Voldemort in wizarding world. I talked with him a while and he seemed to trust me. We made an unbreakable vow that I would help him whenever I was needed and he was to not mess with Mythology worlds. And I also made him vowed on Styx" Percy said "What should I do.. He's my brother and I don't want to see him evil"

Poseidon sighed "He is my son but I never paid him a single visit because of the different world. You are an only chance to bring him back now. You should slowly convince him out of the dark path"

"Do you think if he still has a heart to do that? I meant, what if I fail? What if it isn't a dark force or magic that controls him? What if it is his decision to be evil willingly? I can't deal losing my loyalty on another person, Dad. It will eventually break me...Hera was right, someday...my fetal flaw will be the end of me" Percy said, having his hand on his forehead.

Poseidon smiled a bit "Don't worry, Son. I know you are strong and I'll help you if you fail"

Percy smiled too but it was sadly "Thanks for having my back Dad" He said "I should go now, good bye"

"Goodbye Son" Poseidon said and Percy wiped the mist.

Percy sighed at the fountain before walking back to the manor and found the witch that was with Tom.

"Hi" Percy trailed off his word, looking at the witch who was looking at him with this oh so surprised look.

"You are Dark Lord's brother" She stated, looking at him, not blinking her eyes.

"Yes" Percy said, shrugging as he said that. He couldn't really found any honor in that fact.

"And you used sword" She stated again, this time, accusingly "Aren't you supposed to use wand?"

"Look. I don't even know anything about Wizarding world until some of yours goons kidnapped me and you expected me to use wand?" Percy raised his brows at her "Well I'm free now and I will be very appreciated, if you leave me alone"

With that, she glared at him before walking away with a whiny voice like a girl that wasn't successful in flirting her crush.

"Hmm...wand?" Percy muttered "Let's see what I can do about that"