Tuskguard Captain

Outlast {G} ({G}, {T}: Put a +1/+1 counter on this creature. Outlast only as a sorcery.)
Each creature you control with a +1/+1 counter on it has trample.

Commander Masters

Double Masters 2022

Zendikar Rising Commander

Commander Anthology Volume II

Commander 2016

Several creatures with outlast also grant an ability to creatures you control with +1/+1 counters on them, including themselves. These counters could come from an outlast ability, but any +1/+1 counter on the creature will count.

The cost to activate a creature's outlast ability includes the tap symbol ({T}). A creature's outlast ability can't be activated unless that creature has been under your control continuously since the beginning of your turn.