Fire Juggler is a common Creature — Goblin Shaman card from Morningtide (MOR), collector number 90. Current market price: $0.04 (foil $0.32), TCGplayer market prices via Scryfall.
Whenever this creature becomes blocked, clash with an opponent. If you win, this creature deals 4 damage to each creature blocking it. (Each clashing player reveals the top card of their library, then puts that card on their choice of the top or bottom. A player wins if their card had a greater mana value.)