Strength of the Sun is a 17th level cleric Encounter power that was introduced in Heroes of the Fallen Lands.
Radiant light blazes from your weapon, searing your foe and healing you and a friend
Encounter ✦ divine, healing, radiant, weapon
Standard Action
Melee weapon
Target: One creature
Attack: Wisdom vs. AC
Hit: 3[W] + Wisdom modifier radiant damage.
Effect: You and one ally within 10 squares of you can spend a healing surge.