Rolling Earthquake — ruling 1

Horsemanship is a keyword ability that functions similarly to flying. It appears in the Portal: Three Kingdoms set and does not appear in the Double Masters set. This means that in most cases Rolling Earthquake will simply deal X damage to each creature and each player, even creatures depicted on horseback in their illustration.

Rolling Earthquake : règles, fonctionnement et interactions (MTG)

Rolling Earthquake 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

Rolling Earthquake deals X damage to each creature without horsemanship and each player.

How it works : Rolling Earthquake

Original English text — Wizards of the Coast / Scryfall

#1August 7, 2020· Wizards of the Coast
Horsemanship is a keyword ability that functions similarly to flying. It appears in the Portal: Three Kingdoms set and does not appear in the Double Masters set. This means that in most cases Rolling Earthquake will simply deal X damage to each creature and each player, even creatures depicted on horseback in their illustration.
No other card is named in this ruling.