
Land
This land enters tapped.
: Add
.
: Put a +1/+1 counter on each green creature that entered this turn.

Utility green-aligned land providing counter or token value.

Green utility land that ramps for big green creatures.

Synergizes by amplifying the +1/+1 counters added.

Doubles counters placed by Oran-Rief's ability.

Multiplies the +1/+1 counters added each turn.

Land that pumps your team with +1/+1 counters.

Green payoff for big creatures entering, generating value.

Adds counters whenever creatures enter, similar counter theme.
Oran-Rief's last ability affects all permanents that are green creatures that entered this turn, not just the ones you control.
Oran-Rief's last ability cares about permanents' characteristics at the time the ability resolves, not their characteristics at the time they entered. For example, if a blue creature enters, then is turned green by a spell or ability, then Oran-Rief's second ability resolves, you'll put a +1/+1 counter on that creature.