Rhox Maulers — ruling 1

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.

Rhox Maulers — ruling 2

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

Rhox Maulers — ruling 3

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.

Rhox Maulers : règles, fonctionnement et interactions (MTG)

Rhox Maulers is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) Renown 2 (When this creature deals combat damage to a player, if it isn't renowned, put two +1/+1 counters on it and it becomes renowned.)

How it works : Rhox Maulers

Original English text — Wizards of the Coast / Scryfall

#1June 22, 2015· Wizards of the Coast
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.
No other card is named in this ruling.
#2June 22, 2015· Wizards of the Coast
If a creature with renown deals combat damage to its controller because that damage was redirected, renown will trigger.
No other card is named in this ruling.
#3June 22, 2015· Wizards of the Coast
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.
No other card is named in this ruling.