Nils, Discipline Enforcer
From Commander 2021 set
Nils, Discipline Enforcer
Legendary Creature — Human Cleric
2/2
At the beginning of your end step, for each player, put a +1/+1 counter on up to one target creature that player controls.
Each creature with one or more counters on it can't attack you or planeswalkers you control unless its controller pays
, where X is the number of counters on that creature.