Well if you can steal items why not try and siphon off health/mana?
You've got Life Leech in Divine Divinity. Isn't that the kind of you're talking about? (Life Leech: drain life from opponent, you gain the life leeched this way.)
I am in blood Stepp'd in so far, that, should I wade no more, Returning were as tedious as go o'er.
