Undead – a Necropolis mod.

I was thinking, what if we remembered some really good units from Heroes of Might and Magic III: In the Wake of Gods? Dragonliches Bone dragons have an animation where, when they are hit, they open their mouths and seem to exhale. We could take this animation, create a lich's attack with a cloud, and use it as an upgrade (remove incorporeality, but give them ranged attack, maybe poison and a couple of spells (plague and something else), and also add a debuff, like a terrifying aura, fear attack, give them 150 HP, as before, damage 30-50, and balance them through abilities, not stats (weak, but annoying)).