Hmmm.

I’m not quite sure how I feel about the name of the action or the degree of randomness in it (remember super tasks), but the mechanic of trading health for energy feels sound.

the hard part about supertask is that you have to set some kind of limit, otherwise they could try trading 1,000,000 times. This prevents it due to possible death prevent you from trading that many times.

This concept seems okay at first. Each die roll for HP subtracts at minimum 1 HP, which means you can only do this action from default at most 100 times. I think there lies a problem, if someone were to declare this action done 50 times, they’d ultimately have to roll it 50 times in the GNDT. Maybe for this dynasty we need a mechanic to simulate rolling lots of dice (if the Mortals do want to encourage dice for this dynasty that is)
for now, if you wanted to do a more simple HP -> EP that’d be fine by me.

Per card. I suspect dice are fine in the sense of tending towards infinity - I can roll DICE10 an infinite number of times and declare the total to be infinity - but we definitely need a rule to clarify how we handle infinity within the context of a game variable. (Ideally something intuitive and gamelike, so we all understand it - maybe if you can provably get a stat above 10,000 then you can flip it to be “infinity” and it now behaves like a resource which never decreases when spent.)

The GNDT doesn’t handle 5DICE10, now does it?