Is it possible for Black goat to use necrophagy at 0 power?Spell books will say what type of ability they give, it's right at the beginning of the text.
The rulebook states that you can't do any actions once at 0 power not even free actions. But a post battle event isn't considered an action is it?
E.g. (Action: 3) for an action that costs 3 power or (Ongoing) for an ongoing ability.
Necrophagy is not an action IIRC so it can be used even when black goat is out of power.