Doomstalker (3.5e Equipment)
From D&D Wiki
Doomstalker: Doomstalker is a +2 adamantine disruption great staff. This heavy weapon is said to have been forged by a monk of the Iron Order, crafted from a meteorite found near his monastery. This weapon is a powerful tool in which to combatant the legions of undead. This weapon glows in a faint-silver light when within 100 ft of undead.
Abilities: Disrupt Undead (at will)
Disrupt Undead: With a command word, the wielder may direct a 30ft ray of positive energy from a side of this weapon, dealing 1d6 points of damage to any undead with a successful touch attack. After Discharging, Doomstalker loses its Disruption weapon quality for 1d4-1 rounds (min 1).