SRD:Mighty Disruption (Epic Weapon Enhancement)

Mighty Disruption
Any undead creature struck in combat must succeed at a Fortitude save (DC 21) or be destroyed. A weapon of mighty disruption must be a bludgeoning weapon. (If this property is rolled for a piercing or slashing weapon, reroll.)

Caster Level: 21st; Prerequisites: Craft Magic Arms and Armor, Craft Epic Magic Arms and Armor, true resurrection; Market Price: +6 bonus.