Your touch can infect and drain vitality from undead.
Benefit: Once per day, whenever you make a
successful touch attack against an undead foe, you
may regain 1d8 hit points, and the undead must
immediately make a saving throw versus the
vivification virus with a DC equal to 13 + your
character level . If the target fails the saving throw, he
is immediately afflicted with the vivification virus. If
the undead is already infected, it is instead affected by
the effect of the disease.