A +1/+1 counter is a permanent size increase sitting on a creature. Nothing you spend wears off at the end of the turn, so the board only ever gets bigger. The deck wants creatures that arrive with counters, cards that add more, and payoffs that care how many are already there.

Not this one?

Leave empty for no limit. Cards you own do not count.

Commanders for +1/+1 counters

Ordered by how often they are played, with the ones you own first.