Maelstrom Colossus is a common Artifact Creature — Golem card from Foundations Jumpstart (J25), collector number 754. Current market price: $0.58, TCGplayer market prices via Scryfall.
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)