Sworn enemy.

I don't know, I don't know. Everything I read above probably refers to an idealized map model, because in real conditions, you won't encounter many neutral units that the enemy will have... Will it be easier to clear out mobs? Probably not, it's rare to find the same mobs on a map... Even if they are the same, mobs of different levels are rare, but if everything works out, then this ability is just super-duper... And if you combine it with Anven, then the result can be described with one word: disaster...