Copycrook
From Modern Horizons 3 set
Copycrook
Creature — Shapeshifter Rogue
0/0
You may have this creature enter as a copy of any creature on the battlefield, except it has "Whenever this creature attacks, it connives." (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)