Gaze of the Sun is a 19th level cleric Daily power that was introduced in Heroes of the Fallen Lands.
Gaze of the Sun
Cleric Attack 19
You create a pulse of divine light from your weapon. No foe can hide within its brilliance.
Close blast 5
Target: Each creature in the blast
Attack: Wisdom vs. Reflex
Hit: Ongoing 20 radiant damage (save ends).
Miss: Ongoing 10 radiant damage (save ends).
Effect: Until the ongoing damage ends on a target, that target cannot benefit from concealment, invisibility, or being hidden.