When he's mad, he feels like he's suffered so much he shouldn't have to earn anything anymore, or doesn't care enough to even though he knows he doesn't deserve it.

[Her voice is - restrained, trying to be empathetic. She can't help a certain amount of contempt. Powers are a crutch; she wants to hiss at everyone who falls apart without them. It helps to remind herself that it was Cassel being hurt when Zane was helpless that started it, that he complained bitterly about first.]

What kind of arrangements are you thinking of? Because if you could just...lay down conditions and hand him a vial, I think he's desperate enough now that it would jump over his objections and his disbelief at once.