Unruly Catapult is a common Artifact Creature — Construct card from Wilds of Eldraine (WOE), collector number 156. Current market price: $0.30 (foil $0.37), TCGplayer market prices via Scryfall.
Defender {T}: This creature deals 1 damage to each opponent. Whenever you cast an instant or sorcery spell, untap this creature.