Out of Character Thread 4
BB, please correct if your versions function differently, but according to the Magic Item Compendium:
Doom Burst: Whenever you score a critical hit with this weapon, a wave of blackness washes over the target, causing it to become shaken (no saving throw) for 5 rounds. This effect activates even if the creature struck is not normally subject to extra damage from critical hits. This effect doesn't stack with itself or with any other fear effects (it can't render an already shaken creature frightened, for example).
Hammerblock: A hammerblock shield or suit of armor magically turns away bludgeoning weapons, such as maces and clubs. While wearing armor or carrying a shield that has this property, you gain damage reduction 5/piercing or slashing.