Saruman the White

0: Investigate (Create a colorless Clue artifact token with “2, Sacrifice this artifact: Draw a card.”)
+1: Amass 2. (Put two +1/+1 counters on an Army you control. If you don’t control one, create a 0/0 black Uruk-hai Army creature token first.)
-6: Gain control of target opponent during that player’s next turn. After that turn, that player takes an extra turn.