[militarist]

Thank you, rdnoj.
Your description describes exactly my expectations. Th eonly reason why I started to think how this life drain is connected to this rapier, is the fact that when you forge a 1h sword for this vampire, and equip him with it, lifedrain also disappears. And if it was showing that when he had rapier, he had two attacks (when you click on "attack skill N" line), when you replaice rapier with any other 1h weapon, it shows only one attack. And no lifedrain attack in list of equipment, as I mentioned.
And this is not clear for me. I though - I wil replaice rapier with something more useful and will have this lifedrain.