Outland Colossus

Renown 6 (When this creature deals combat damage to a player, if it isn't renowned, put six +1/+1 counters on it and it becomes renowned.)
This creature can't be blocked by more than one creature.

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Magic Origins

Renown 6 (When this creature deals combat damage to a player, if it isn't renowned, put six +1/+1 counters on it and it becomes renowned.)Outland Colossus can't be blocked by more than one creature.

If a creature with renown deals combat damage to its controller because that damage was redirected, renown will trigger.

If a renown ability triggers, but the creature leaves the battlefield before that ability resolves, the creature doesn't become renowned. Any ability that triggers "whenever a creature becomes renowned" won't trigger.

Renown won't trigger when a creature deals combat damage to a planeswalker or another creature. It also won't trigger when a creature deals noncombat damage to a player.