Etheralus, the Eternal Reward - World of Warcraft item

Finger

Miscellaneous

Use: Awakens the powers of Etheralus rings worn by you and your allies, increasing healing and absorption done by 1% for 15 sec. When this effect ends, each empowered player unleashes a burst of energy that shields your allies, absorbing damage equal to 1% of all healing done while empowered, divided evenly among the shielded players. (2 min shared cooldown)