Laurel suits up a week later, at her own behest, and Thea and Oliver can't exactly stop her when they suited up so soon after dying and coming back themselves. When she's out in the field, though, she quickly spirals out of control, beating a Ghost half to death and only stopping when Nyssa yells Laurel's name.
Later when they're back in the bunker, Nyssa holds ice to Laurel's bloody knuckles, and Nyssa wishes they were alone so she could kiss them.
"I told you this would happen," Oliver says.
"The Ghost ended up taking his own life," Nyssa snaps back. "And we will deal with this." She tries to look reassuringly at Quentin, but all she sees is worry in the lines on his face.
"How? We don't have any more of the lotus."
"We don't need the lotus," Thea says. Everyone looks at her. "Malcolm… he said that the only way to fight the bloodlust was to take the life of the one who took yours."
"That's why Sara went after you when she first came out of the Pit," Felicity says.
"Exactly. And Ra's was already dead when my bloodlust started to manifest," Thea explains. "So I didn't have anyone to kill. But Laurel - Laurel does."
"This is madness!" Oliver says.
"Is it, Oliver?" Diggle asks. "If anyone deserves to die, it's Damian Darhk."
"We're not killers - you're not a killer, Laurel." Oliver meets Laurel's eyes, clearly trying to plead with her to see reason. But she stays quiet.
"I mean, I remember that time I shot Officer Daly. He seemed pretty dead to me," Laurel says finally.
"And you are hardly one to go on your high and mighty about killing, Oliver," Nyssa adds. "Or did you forget that you killed my father?"
"That was necessary -"
"And Darhk is not? He killed a woman you claim to have loved for half your life."
But at this Laurel's hand closes around Nyssa's wrist. "It's okay, Nyssa."
"No, it's not! I will not stand by while you are plagued with a problem I promised I would fix."
"That we would fix," Quentin says hastily.
Still, true to her word, Nyssa tracks down Darhk on her own, with no help from anyone. Laurel suits up again, and just as Nyssa predicted, Darhk is in a warehouse on Fulton with the Ghosts. Nyssa subdues his magic with some old magic of her own that she learned from her father, while Laurel turns up the frequency of the Canary Cry so the Ghosts pass out from the sound of her scream.
And it's hard, the hardest mission she's ever been on because she hasn't had help, but finally Nyssa binds his wrists with a trick arrow aimed perfectly and she holds his arms behind his back as she hands Laurel an arrow to stab Darhk with. Laurel barely hesitates, and Darhk yells in pain when the arrow pierces through his lung. Nyssa lets him fall to the ground, motionless, and she meets Laurel's triumphant gaze as Darhk's life slowly but surely seeps away, as readily as the blood that leaks from his chest.