Applies Mangler's Covenant Effect to your group, granting you and other berserkers in your group the chance to proc Mangler's Bladestrike on your melee attacks. Applies Mangler's Covenant Trigger to your foe, weakening their defenses against those spells from other Berserkers. If 10 spells strike your foe in 18 seconds, the covenant will be resolved, resulting in Mangler's Resolution dealing a large amount of damage to your foe.