Cheapest priced copy (Final Fantasy: Through the Ages): $0.35 at Card Kingdom, near mint, their price list as of .
Luca Stadium 
Strixhaven Stadium
Artifact · Uncommon · Final Fantasy: Through the Ages · #63
{T}: Add {C}. 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.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
6 printings · $0.35 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Final Fantasy: Through the Ages (Luca Stadium) | 63 | Uncommon | $0.35 | $0.79 |
| Final Fantasy: Through the Ages (Luka Stadium) | 63† | Uncommon | — | — |
| Strixhaven: School of Mages Promos | 259p | Rare | $1.29 | $0.49 |
| Strixhaven: School of Mages Promos | 259s | Rare | — | $1.99Out of stock |
| Strixhaven: School of Mages | 259 | Rare | $0.69 | $0.49 |
| Strixhaven: School of Mages | 358 | Rare | $1.29 | $1.99Out of stock |
4 rulings from Wizards of the Coast
- 16 April 2021In 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.
- 16 April 2021If 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.
- 16 April 2021“That player” refers to the opponent who was dealt damage.
- 16 April 2021The 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.