Curious Colossus is a mythic Creature — Giant Warrior card from Lorwyn Eclipsed (ECL), collector number 12. Current market price: $0.75 (foil $0.81), TCGplayer market prices via Scryfall.
When this creature enters, each creature target opponent controls loses all abilities, becomes a Coward in addition to its other types, and has base power and toughness 1/1.