Unconquerable Spirit is a 19th level cleric Daily power that was introduced in Heroes of the Fallen Lands.
Unconquerable Spirit
Cleric Attack 19
Filled with the divine power of ancient heroes, you strike, and your attack fortifies you and your companions.
Melee weapon
Target: One creature
Attack: Wisdom vs. AC
Hit: 3[W] + Wisdom modifier damage.
Miss: Half damage.
Effect: You and each ally within 5 squares of you regain hit points as if you had each spent a healing surge.