The Witness, Voice in the dark

Eminence - Whenever a Hive, Scorn or
Disciple enters, put a finality counter on target creature an opponent controls.

Creatures your opponents control with finality counters on them can´t attack or block.

{x}{w/b}{g/u}: Gain control of target creature an opponent controls with mana cost X or less if it has
a finality counter on it.