Overseer

Flying, Detector
{t} : Create a 0/2 Changeling creature token
with haste and "Changeling cannot block if
attacking opponent controls a creature with Detector".
Exile that token at the end of turn.
{t}, Exert Overseer : Target opponent
reveals up to 3 random cards from their hand.
{t}, Exert Overseer : Scry 1