The most useful monster.

Vampires are simply indispensable against living creatures, and I completely agree with that. But against constructs/elementals/undead, they only have the advantage of retaliation. It's important to remember that vampires have very low health for their level, and while they successfully restore it and tear through everyone against living creatures, undead can certainly give them a fight. And after hitting the vampires with disintegration, they won't recover much (Zubr will confirm ;) ). So, as in any good game, there is a counter for every strength ;) Although I don't argue - vampires are awesome on level 3 :)