Ember Beast — ruling 1

Ember Beast can’t attack or block unless another creature is also assigned to attack or block at the same time. Notably, two Ember Beasts can attack or block together.

Ember Beast — ruling 2

Once Ember Beast has been declared as an attacker or blocker, it doesn’t matter what happens to the other creature(s).

Ember Beast — ruling 3

Other creatures assigned to attack alongside Ember Beast don’t have to attack the same player or planeswalker. Other creatures assigned to block alongside Ember Beast don’t have to block the same creature as Ember Beast.

Ember Beast : règles, fonctionnement et interactions (MTG)

Ember Beast 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

This creature can't attack or block alone.

How it works : Ember Beast

Original English text — Wizards of the Coast / Scryfall

#1December 8, 2022· Wizards of the Coast
Ember Beast can’t attack or block unless another creature is also assigned to attack or block at the same time. Notably, two Ember Beasts can attack or block together.
No other card is named in this ruling.
#2December 8, 2022· Wizards of the Coast
Once Ember Beast has been declared as an attacker or blocker, it doesn’t matter what happens to the other creature(s).
No other card is named in this ruling.
#3December 8, 2022· Wizards of the Coast
Other creatures assigned to attack alongside Ember Beast don’t have to attack the same player or planeswalker. Other creatures assigned to block alongside Ember Beast don’t have to block the same creature as Ember Beast.
No other card is named in this ruling.