I like that hider idea for the characters. Going to do that for all eight after this. Anyway, there is one other possible way to make things more interesting. When I first made them they were all connected. I didn't use the idea for this because I thought it might get too complicated, but originally, when one was destroyed, their power would get split up among the rest. So one died, and the rest got a 1/8 power increase. After four died, the rest ended up with a total increase of 200%. Leaving the final Demon alive at eight times their starting strength.
Would that kind of mechanic work in this situation?