Nick is an anti-hero (I mean, he's been covering up crimes and murdering people in mostly self-defense for how long?) so it wouldn't be a stretch to have him go after a bad Grimm and make some sort of disgusting meat potion like Adalind did. Or any other kind of disturbing ritual.
Of course, that would open the question of why aren't ordinary people doing the same thing to become what amounts to superheros.
Of course, that would open the question of why aren't ordinary people doing the same thing to become what amounts to superheros.
"I can feed the caterpillar, I can whisper through the chrysalis, but what hatches follows its own nature and is beyond me."
-- Hannibal (TV show)
-- Hannibal (TV show)