Diggle: He's not human anymore.
Darhk: Oh, I'm still human. Just better.

Arrow Season 4 Episode 22 Quotes

I'm pulling the oxygen out of your bodies molecule by molecule, but there's good news. I'm not going to kill you. Well, not right now at least. Instead, I'm going to regain control of Rubicon that way when the whole world goes all Dr. Strangelove, you can feel your skin melt from armageddon.

Darhk

Diggle: He's not human anymore.
Darhk: Oh, I'm still human. Just better.