Commands can cost EP, can they cost HP too, there're a few things I want to do with this, I want one unit to have a berserk ability so that at the cost of half of their HP they can move to a location very fast, and when I start working on hero units, I want them to be able to tribute health for ep using a positive hp cost and negative ep cost. Self destruct units would also be pretty fun.
At the minute I'm using a <tick-immediately> self-effect with -25 health regen to quickly take away health during the start of beserk.
Edit: Probably not worth it if it works through effects ok so might as well delete this topic.