"So, that doesn't look like X marks the spot." John said as they entered the bunker while examining the map.

"So what does it lead to?" Laurel asked.

"I believe I have an idea, but first, I'd like to know why it took Thea's blood to reveal the map in the first place." Nyssa said.

"She's right. As much as we want to know what the map leads to, we need to know what caused it to reveal itself in the first place." Oliver said as Alena took the parchment from them.

"Nanolithography. The map's printed with bacteria." Alena said.

"Ugh. That's gross." Roy said.

"And when exposed to the enzymes in Thea's DNA, it will reveal itself." Alena said.

"Ancient league secret?" John asked.

"No, no, no. This is bleeding edge science. This requires an atomic force microscope." Alena said.

"- Leave it to Merlyn. - Nyssa, you said you know - what this map leads to." Oliver said.

"- These are Ley lines." Nyssa said.

"Oh, great. Ley lines. Yeah. We had some experience with those with Damien Darhk." Oliver said, remembering how it was Darhk's abduction of his son that led to that discovery.

"These are different. I thought they only intersected in one place on earth." Nyssa said

"Doesn't look that way from this." John pointed out.

"Indeed. These lines are global and suggest the existence of 3 intersections of the kind I thought only existed at Nanda Parbat." Nyssa said and Oliver felt a cold feeling in his gut as he began to put the pieces together.

"Right, but what only exists on Nanda Parbat really? I mean, besides really depressing decor." Thea asked as Oliver looked at Nyssa and they could tell that they were thinking the same thing.

"I know now why Merlyn called his new league the Thanatos guild." Nyssa said.

"Thanatos is the personification of death in Greek mythology." Alena said.

"Exactly. I believe these lines suggest the existence of 3 installments." Nyssa said.

"- But 3 what?" Thea asked.

"Your father discovered the existence of 3 Lazarus pits." Nyssa said, confirming Oliver's suspicions.

"Of course he did." Thea mumbled as she walked away.

"Like one of those things hasn't caused enough trouble." Laurel muttered.

"Thea, come on." Roy said, starting to follow her until Oliver stopped him.

"Hey, Roy. Just let's give her some space." Oliver told him and Roy nodded.

"Speaking of the Lazarus Pit, today in the field, I think I finally solved the mystery of how Laurel survived being stabbed by Darhk." Oliver said, deciding to tell them all at once.

"Really, do tell?" Nyssa said.

"Tonight in the field, Laurel, you had a moment where you lost control. Just like when Thea was suffering from her bloodlust." Oliver said and they put the pieces together.

"Oliver, that's impossible. Nyssa destroyed the pit long before Darhk stabbed me." Laurel said.

"You didn't tell them?" Nyssa asked.

"It slipped my mind with everything else that was going on at the time." Oliver said.

"Tell us what?" John asked.

"When I was undercover with the League, Ra's told me how when Darhk left the League, he didn't just take followers. He also took water from the pit. That's how he lived as long as he did." Oliver explained.

"And now it appears that Damien used his supply of water from the pit to heal Laurel before she died completely." Nyssa said.

"So, now we know how I'm alive, but now I have to live with a blood lust like Thea did?" Laurel asked.

"No. Aside from the lotus, one other cure exists. Killing the person who killed you and last time I checked, Darhk is currently locked up in the Time Bureau's headquarters. I'll contact Sara and see if she can convince the Bureau to let us see Darhk so you can kill him." Oliver said and they all nodded, since that sounded like a plan.

"Wait, how could Laurel have survived two years without indulging the bloodlust?" John asked as a memory surfaced for Laurel.

"I remember now. Before he died, Darhk ordered that I be forced to kill a fellow prisoner once a month to subdue the bloodlust for a time." Laurel answered.

"I'm gonna go call Sara. Roy, keep an eye on Thea and please do not leave the city until we get back." Oliver said and Roy nodded.


It turned out to be easier to convince the Bureau to let them in Oliver had thought, since apparently Ava wanted Darhk dealt with sooner than ever after learning about the hell he put Laurel through.

"Darhk, you've got visitors." Ava said as she approached Darhk's cell and opened the door.

"Oh really, who?" Damien asked as Oliver and Laurel entered his cell.

"Hello Damien. Wow, this takes me back." Laurel said, remembering what happened the last time she and Darhk had been in a prison together.

"I heard you were back in the game. You're welcome." Darhk said.

"Why did you save me? Why go through all the trouble of threatening my dad and making good on that threat just to bring me back?" Laurel asked, wanting to get some answers before she killed him.

"Because, I had a thought shortly after I killed you. Why just kill you when I could turn you into another tool to use against your team. The one enemy they'd never kill." Darhk said.

"You were going to brainwash me and turn me against my own team." Laurel realized.

"Yes, but as you know, things didn't exactly go as planned." Darhk said.

"Well, anyways, I have a problem that I think you can solve." Laurel said.

"And what might that be?" Darhk asked.

"A side effect of the lazarus water you used on me, well, in addition to what I'm assuming is a sonic scream, well, now I'm driven to kill the person who killed me and since I have no intention of being driven by a bloodlust, here we are." Laurel said.

"Ah, so that's why you're here." Darhk said.

"Yeah, so, if you don't mind, let's get this over with." Oliver said.

"You're enjoying this aren't you Oliver?" Darhk asked.

"Considering that the last time we were all in a prison together, Laurel died and now the roles are reversed, yeah, I am." Oliver said.

"So, are you going to kill me or what?" Darhk asked.

"Yep, and Oliver actually gave me something to help with that." Laurel said as she pulled out an arrow.

"Huh, kill me again the same way. Nice." Darhk said.

"The thing is, I'm stabbing you with the same arrow you stabbed me with 2 years ago and boy, payback is sweet." Laurel said as she stabbed Darhk in the heart.