Black Mask, Underworld Boss

Menace
If one or more stun counters would be put on a
creature you don't control, that many plus one
stun counters are put on it instead.
Torturous Tactician — At the beginning of your
upkeep, destroy up to one target creature with a
stun counter on it. If that creature would be put
into a graveyard, exile it instead.