Leonardo da Vinci [ACR - 20]

Rarity: M #: 20 Creature Type or Sub Type: Legendary Creature — Human Artificer P: 3 T: 3 Rules Text Contains: 3UU: Until end of turn, Thopters you control have base power and toughness X/X, where X is the number of cards in your hand. 2U, T: Draw a card, then discard a card. If the discarded card was an artifact card, exile it from your graveyard. If you do, create a token that's a copy of it, except it's a 0/2 Thopter artifact creature with flying in addition to its other types.