Slobad, Tinkerer Ascended

+1: Assemble a Contraption, then you may tap or untap target artifact.
+1: Draw 2 cards, then discard 2 cards. Return a Contraption chosen at random from your graveyard to your command zone.
-7: You get an emblem with "Contraption creatures you control get +X/+X, where X is the number of Riggers you control."