Frenzied Cauterizer's Shirt

 is an epic drop in the chest costume class.

Obtained from

 * ? in Assault and Battery

Feats

 * Heroes: Evermore - Collect all styles in the Vestments of Rage set (50 points)
 * Villains: We'll Burn You All - Collect all styles in the Vestments of Rage set (50 points)