Betrothed of Fire is a common Enchantment — Aura card from Weatherlight (WTH), collector number 89. Current market price: $0.21, TCGplayer market prices via Scryfall.
Enchant creature Sacrifice an untapped creature: Enchanted creature gets +2/+0 until end of turn. Sacrifice enchanted creature: Creatures you control get +2/+0 until end of turn.