Maverick Thopterist is a uncommon Creature — Human Artificer card from The List (PLST), collector number C18-185. Current market price: $0.16, TCGplayer market prices via Scryfall.
Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) When this creature enters, create two 1/1 colorless Thopter artifact creature tokens with flying.