Baloth Cage Trap is a uncommon Instant — Trap card from Modern Masters 2017 (MM3), collector number 120. Current market price: $0.21 (foil $0.09), TCGplayer market prices via Scryfall.
If an opponent had an artifact enter the battlefield under their control this turn, you may pay {1}{G} rather than pay this spell's mana cost. Create a 4/4 green Beast creature token.