[rdonj]

It is written "rapier, life drain", thus they have two completely separate weapons. One which is a rapier, and one which was life drain. The first one only does damage, but the second one drains life, because it is life drain. It is also not to be mistaken with the first one, which is a rapier and does not drain life. I cannot think of a single item in the game, even in a mod, that has a comma separating part of the name of a single item from another part of itself. It works just the same way armor is listed, so I'm not sure why that was confusing to you.

Anyway, back to the subject. The drain life is not a spell. It is a weapon. It does not cost fatigue to use or anything, instead actually it drains fatigue (and life!) back into the vampire equipped with said drain life attack. It acts just like any other weapon. When used with a water bless, it operates in the same exact way as any other weapon in the game. I.E., it attacks twice every other round under ideal conditions. The order of attacks would thus be:

Turn 1): Rapier, Drain Life, Rapier, Drain Life.
Turn 2): Rapier, Drain Life.
Turn 3): Rapier, Drain Life, Rapier, Drain Life.
Turn 4): (back to turn 2)

For the record, R'lyeh's mindblast weapon on recruitables is a weapon, not a spell! It is just an ordinary ranged weapon designed to behave exactly like a spell. It does not cause spellcasting fatigue or any such thing due to its unusual status as a Spell-like Ability That Is Not A Spell(tm).

A forged lifedrain weapon would behave in the exact same way as any normal weapon, except that it's one that can suck life and fatigue out of your enemies. It would drain both hits!!!