Slobad, Tinkerer Ascended

+1: Tap or untap target creature. Tap or untap target artifact.
0: Draw up to two cards, then discard that many cards. You may remove a Contraption card in your graveyard from the game.
-X: Assemble a contraption with converted mana cost X or less. Rigger and Contraption creatures you control get +X/+0 until end of turn.