The most useful monster.

His strength makes him a very formidable enemy, and the outcome of the battle often depends on him. Another advantage for the vampire is the ability to attack without consequences, meaning no one can retaliate. And he can safely eliminate anyone on the battlefield.

Yes, the advantages are significant. But the disadvantages are also considerable. The two main ones are the low growth rate (3 per week, which is not even funny; it's more like "find a lord") and the low HP. The latter makes vampires practically USELESS against undead (skeletons, zombies, and mummies), elementals, and golems.