| And if a character is immune to ability drain, they'd recover automatically at the end of the day.
It's simple, and it doesn't introduce a new mechanic. Backlash spells seems like the kind of thing that you would use only when at full hit points, though. Otherwise the hit point loss from the Con penalty would kill you. I'm not sure if this is a feature or a bug. I think the latter; backlash feels like something you'd risk in extremis, not something that you only invoke when you are safe and fully healed up.
A way of doing this would be to stipulate that the Autoimmolator feat has a curative effect when invoked; that is, if the caster experiences a restoration of physical ability damage hit points at the same time as he incurs a backlash penalty.
Would that be possible? I like the notion of trading future vulnerability for immediate power - it's more seductive than having the real cost paid up front. |