Hurloon Battle Hymn is a uncommon Instant card from Dominaria United (DMU), collector number 131. Current market price: $0.25 (foil $0.26), TCGplayer market prices via Scryfall.
Kicker {W} (You may pay an additional {W} 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.