Robert Knox, The Inventor

+2: Create a 2/2 colorless robot artifact creature token with "Whenever this deals damage to a player, this gets that many +1/+1 counters."
0: Search your library for a card, reveal it, then exile it. Robert Knox gains loyalty counters equal to the CMC of the exiled cards.
-15: You get an emblem with, "Whenever a card enters the battlefield return target card from exile or a graveyard to your hand. Its mana cost is 0."