Leech

It drives its owner's mind into a narrow purpose: gorging on drained life force.

A runed demon blade

+13, +4 demon blade

Vampiric brand
Cursed, 25% chance of recursing itself on equip
-1 AC
-1 EV
-1 STR
-1 INT
-1 DEX
rN+

Desirability

A vampiric demon blade is a very nice thing to have, and the slight stat, AC and EV costs are reasonably well worth it. You may wish to switch to something more damaging if you run into a particularly nasty undead enemy; given this weapon's ability to re-curse itself, doing so often may cause problems.