Maverick Thopterist is a uncommon Creature — Human Artificer card from Duel Decks: Elves vs. Inventors (DDU), collector number 50. Current market price: $0.11, 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.