Hellstaff

From Doom Wiki

The Hellstaff is a weapon in Heretic. It appears to be made out of a demon's skull and spinal column. The Hellstaff is powered by runes and rapidly fires red energy projectiles similar to Doom's plasma gun. When a Tome of Power is active, the Hellstaff's firing rate slows down, and it launches powerful projectiles that rain a fiery substance on the area of impact at the cost of five runes per shot. The amount of damage inflicted by the rain increases with the size of the enemy as more droplets hit, making large foes such Weredragons and Iron Liches particularly vulnerable. The powered-up shots will also home in on enemies provided they are centered in the player's aim when the weapon is fired. This weapon is always effective on ghosts. Maximum capacity is 200 shots, or 400 with the Bag of Holding.

Heretic weapons
Staff	Elven Wand	Ethereal Crossbow	Dragon Claw	Hellstaff	Phoenix Rod	Firemace
Gauntlets of the Necromancer