Commander Tartar

: Commander Tartar can be your commander. Whenever a creature deals damage to Commander Tartar, it gets a slime counter.
+2: Put a slime counter on target creature. It can't attack or block until your next turn. Create a Thang artifact token with indestructible.
-7: Gain control of all creatures with slime tokens on them. You may sacrifice four Thangs. If you do, target opponent discards their hand.