Inner-Flame Acolyte is a common Creature — Elemental Shaman card from Lorwyn (LRW), collector number 181. Current market price: $0.34 (foil $1.06), TCGplayer market prices via Scryfall.
When this creature enters, target creature gets +2/+0 and gains haste until end of turn. Evoke {R} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)