NHF – new heroes for Heroes V 3.1.

I'm 100% sure they'll call this nonsense, but still:
LE
Oracle of Rebirth - after battle, it transforms fallen elves (dancers, elven archers, druids) into dryads.
The number of dryads is a percentage of the fallen, but not more than the hero's level and not more than the number of ents in the army (an elf won't become a dryad without an ent).