Brandishing your holy symbol, you drive undead away and bolster your allies against them.

Encounter ✦     Zone
Minor Action      Close burst 1

Requirement: You must be wearing or holding a holy symbol.

Effect: The burst creates a zone that lasts until the end of your next turn. When you move, the zone moves with you, remaining centered on you. While within the zone, your allies gain a +2 power bonus to all defenses against undead creatures. If an undead creature ends its turn within the zone, you push it 1 square as a free action.

Published in Player's Handbook 3, page(s) 174.