Serra's Hymn 
Enchantment
At the beginning of your upkeep, you may put a verse counter on this enchantment. Sacrifice this enchantment: Prevent the next X damage that would be dealt this turn to any number of targets, divided as you choose, where X is the number of verse counters on this enchantment.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL