Acolyte of the Inferno — ruling 1

Acolyte of the Inferno's last ability will trigger once for each creature that blocks it. Each of those creatures will be dealt 2 damage.

Acolyte of the Inferno — ruling 2

Acolyte of the Inferno's last ability triggers and resolves before combat damage is dealt. If that causes each creature blocking Acolyte of the Inferno to be destroyed, Acolyte of the Inferno will remain blocked and neither deal nor be dealt combat damage.

Acolyte of the Inferno — ruling 3

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.

Acolyte of the Inferno — ruling 4

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

Acolyte of the Inferno — ruling 5

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.

Acolyte of the Inferno : règles, fonctionnement et interactions (MTG)

Acolyte of the Inferno 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

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.) Whenever this creature becomes blocked by a creature, it deals 2 damage to that creature.

How it works : Acolyte of the Inferno

Original English text — Wizards of the Coast / Scryfall

#1June 22, 2015· Wizards of the Coast
Acolyte of the Inferno's last ability will trigger once for each creature that blocks it. Each of those creatures will be dealt 2 damage.
No other card is named in this ruling.
#2June 22, 2015· Wizards of the Coast
Acolyte of the Inferno's last ability triggers and resolves before combat damage is dealt. If that causes each creature blocking Acolyte of the Inferno to be destroyed, Acolyte of the Inferno will remain blocked and neither deal nor be dealt combat damage.
No other card is named in this ruling.
#3June 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.
#4June 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.
#5June 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.