This rune-scarred bone has the power to temporarily stun undead.
Wondrous Item 105,000 gp
Power Daily (Standard Action)
Make an attack: Close burst 5; targets undead creatures; +22 vs. Will; on a hit, the target is stunned until the end of your next turn or until it is attacked, whichever comes first.
Published in Adventurer's Vault, page(s) 169.