Edited to Add: I've figured out how to break this: Special Monk Weapon (e.g. Quarterstaff), with the ability Necrotic Focus from the Libris Mortis. (That is, if non-core books are allowed in the game.) Allows energy drain spells to be delivered via manufactured weapons.
One overpowered NPC, here we come.
Hmm. I thought I had this question down, but now I'm not sure.
Somebody on this forum recently said
that a vampire monk could not combine its energy drain attack with its regular unarmed strike. I don't think this is true. Monk
The monk description says, "A monk’s unarmed strike is treated both as a manufactured weapon and a natural weapon for the purpose of spells and effects that enhance or improve either manufactured weapons or natural weapons."
It does not explicitly say that an unarmed strike is a natural weapon. However, this seems pretty intuitive to me. Thoughts on this?
From the vampire description: "Energy Drain (Su)--Living creatures hit by a vampire’s slam attack (or any other natural weapon the vampire might possess) gain two negative levels. For each negative level bestowed, the vampire gains 5 temporary hit points. A vampire can use its energy drain ability once per round."
So the way I see it is you could have a vampire monk attacking with a Flurry of Blows every round and Energy Draining on the first attack that hits. Perhaps not the most efficient thing in the world, but certainly possible, and certainly combinable.
Of course, back in 3.0, vampires had to be chaotic evil, so it was a moot point anyway. But now they can be lawful! Huzzah!
(I have a vampire monk NPC in a world I'm building at the moment.)
While I'm at it here, does anyone know if a monk can effectively take the Two-Weapon Fighting feats?