Dimir Mastermind

Decoy (when you cast this card, cast it into exie face-down with a decoy counter on it, if you do put a 2/2 colorless decoy creature token onto the battlefield it has "when this creature leaves the battlefield you may put a card you own with a decoy counter on it from exile onto the battlefield under your control")
Hexproof.
Decoy creatures you control get +1/+1 and Hexproof.