Heads Up

 
Prerequisite(s): Spell-like abilities or ability to cast arcane or divine spells
 
Benefit: If you grasp the severed head of a creature with a gaze supernatural ability (such as the petrifying gaze of a medusa) within 1 hour of the creature being slain, you may use that creature's head to employ the slain creature's gaze supernatural ability as a standard action up to three times during the next 24 hours. After that time the head is rendered useless. Retrieving the head from a slain creature is a full-round action that provokes an attack of opportunity.
 
Source: Dragon Compendium