Undead Summoning VII

The most powerful version of the undead summonings, this spell conjures 1d3+1 specters (50% chance), 1d3 vampires (40% chance), or 1 revenant (10% chance) to the caster's aid. The monsters attack the caster's enemies to the best of their ability until he commands the attack to cease, the spell duration expires, or the monsters are defeated or turned. If this spell happens to summon a revenant, the monster selects an opponent designated by the caster as its hated nemesis and attacks the selected victim single-mindedly. The undead summoned by this spell vanish when slain. If no enemy is present for the undead to engage, they follow any other commands or undertake simple tasks as the wizard directs.

The material component is a bit of bone taken from a lich.

Notes: Restricted to necromancers, very rare.