Life Lanterns is a 25th level cleric Daily prayer that was introduced in Divine Power.
Life Lanterns
Cleric Attack 25
Tiny lanterns appear next to your foes and bedazzle them with divine light, which can heal your friends wounds.
Ranged 5
Target: One, two, or three creatures
Attack: Wisdom vs. Will
Hit: The target is weakened (save ends).
Effect: For each target, you conjure a life lantern, which appears in 1 square occupied by that target and lasts until the end of the encounter. Any enemy that starts its turn in a life lantern's square is dazed until the start of its next turn. Any ally who starts or ends his or her turn in a life lantern's square can regain hit points as if he or she had spent a healing surge. Doing so destroys that lantern.