User blog comment:SpiritedDreaming/RWBY: Attack on Kevin Tower Defense Game/@comment-27803627-20160830172224/@comment-26018514-20160830210750

I think any damage addition would be too much Spirit.

To clarify, the Grimm healing ability does nothing without the shedding ability.

With the shedding ability, Grimm Healing restores 10 health to Kevin per day maximum... after dealing 100 damage. so that's about 10 days minimum for Kevin to return to max health, while he can only really Spawn I think 3-4 species tops(because it ONLY brings back exactly 100hp of Grimm at most, and we then have a week to kill them before anything more spawns) which means that after we kill them all, he could be at less than full health.