Bubble Smuggler is a common Creature — Octopus Fish card from Murders at Karlov Manor (MKM), collector number 41. Current market price: $0.17 (foil $0.06), TCGplayer market prices via Scryfall.
Disguise {5}{U} (You may cast this card face down for {3} as a 2/2 creature with ward {2}. Turn it face up any time for its disguise cost.) As this creature is turned face up, put four +1/+1 counters on it.