Rage Forger is a uncommon Creature — Elemental Shaman card from Morningtide (MOR), collector number 97. Current market price: $0.30 (foil $1.78), TCGplayer market prices via Scryfall.
When this creature enters, put a +1/+1 counter on each other Shaman creature you control. Whenever a creature you control with a +1/+1 counter on it attacks, you may have that creature deal 1 damage to target player or planeswalker.