Volatile Rig — ruling 1

If Volatile Rig is dealt damage by multiple sources at the same time (for example, multiple blocking creatures), its first triggered ability will trigger only once.

Volatile Rig : règles, fonctionnement et interactions (MTG)

Volatile Rig 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 attacks each combat if able. Whenever this creature is dealt damage, flip a coin. If you lose the flip, sacrifice this creature. When this creature dies, flip a coin. If you lose the flip, it deals 4 damage to each creature and each player.

How it works : Volatile Rig

Original English text — Wizards of the Coast / Scryfall

#1October 1, 2012· Wizards of the Coast
If Volatile Rig is dealt damage by multiple sources at the same time (for example, multiple blocking creatures), its first triggered ability will trigger only once.
No other card is named in this ruling.