Strixhaven Stadium — ruling 1

“That player” refers to the opponent who was dealt damage.

Strixhaven Stadium — ruling 2

If multiple creatures deal combat damage to you or an opponent at the same time, the appropriate ability of Strixhaven Stadium will trigger that many times. You can put these abilities on the stack in any order. The last ability put on the stack will be the first to resolve.

Strixhaven Stadium — ruling 3

In a multiplayer game, if creatures you control deal combat damage to multiple opponents at the same time, the last ability will trigger multiple times. However, because the counters are removed, it is difficult (but not impossible) to make multiple players lose the game from this ability in the same combat phase.

Strixhaven Stadium — ruling 4

The check for ten or more point counters happens only as the last ability is resolving. Notably, if you add the tenth point counter some other way, no one will lose the game . . . yet.

Strixhaven Stadium : règles, fonctionnement et interactions (MTG)

Strixhaven Stadium 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

: Add . Put a point counter on this artifact. Whenever a creature deals combat damage to you, remove a point counter from this artifact. Whenever a creature you control deals combat damage to an opponent, put a point counter on this artifact. Then if it has ten or more point counters on it, remove them all and that player loses the game.

How it works : Strixhaven Stadium

Original English text — Wizards of the Coast / Scryfall

#1April 16, 2021· Wizards of the Coast
“That player” refers to the opponent who was dealt damage.
No other card is named in this ruling.
#2April 16, 2021· Wizards of the Coast
If multiple creatures deal combat damage to you or an opponent at the same time, the appropriate ability of Strixhaven Stadium will trigger that many times. You can put these abilities on the stack in any order. The last ability put on the stack will be the first to resolve.
No other card is named in this ruling.
#3April 16, 2021· Wizards of the Coast
In a multiplayer game, if creatures you control deal combat damage to multiple opponents at the same time, the last ability will trigger multiple times. However, because the counters are removed, it is difficult (but not impossible) to make multiple players lose the game from this ability in the same combat phase.
No other card is named in this ruling.
#4April 16, 2021· Wizards of the Coast
The check for ten or more point counters happens only as the last ability is resolving. Notably, if you add the tenth point counter some other way, no one will lose the game . . . yet.
No other card is named in this ruling.