Add for each creature you control.

Kicker (You may pay an additional as you cast this spell.)

Hurloon Battle Hymn deals 4 damage to target creature or planeswalker. If this spell was kicked, you gain 4 life.

Target player discards two cards at random.

At the beginning of your upkeep, you may put a verse counter on Serra's Hymn.

Sacrifice Serra's Hymn: 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 Serra's Hymn.