Triangle O
Triangle O is a Normal Spell in the Ancient Treasure archetype, first released in 2024 in Maze of Millennia. It has 2 printings across 2 sets (Rare, Ultra Rare). The cheapest copy is MP24-EN273 Ultra Rare at $0.10; the most valuable is MZMI-EN020 Rare at $0.17. In the TCG it is currently unlimited (3 copies).
Market price · TCGPlayer
Updated Oct 1, 2026
$0.10 – $0.17
2 printings priced
Type
Normal
If you control "Crystal Skull", "Ashoka Pillar", and "Cabrera Stone": Destroy all cards on the field, also for the rest of this turn, your opponent takes any effect damage you would have taken instead. You can banish this card from your GY, then target 1 each of "Crystal Skull", "Ashoka Pillar", and "Cabrera Stone" in your GY; shuffle them into the Deck, then draw 3 cards. You can only use 1 "Triangle O" effect per turn, and only once that turn.
Appears in 2 expansions
Printings (2)
| expansion | Code | Rarity | Price | Buy |
|---|---|---|---|---|
| Maze of Millennia | MZMI-EN020 | Rare | $0.17 | |
| 25th Anniversary Tin: Dueling Mirrors | MP24-EN273 | Ultra Rare | $0.10 |
Triangle O: FAQ
How much is Triangle O worth?+
Triangle O currently sells for $0.10 – $0.17 on TCGPlayer, from $0.10 for MP24-EN273 up to $0.17 for MZMI-EN020. The exact value depends on the printing, rarity, edition and condition — scan the card with YuScan to see the price of your copy.
Which sets was Triangle O printed in?+
Triangle O appears in 2 sets: Maze of Millennia, 25th Anniversary Tin: Dueling Mirrors.
Is Triangle O legal in tournaments?+
On the current TCG Forbidden & Limited List, Triangle O is unlimited (3 copies).
What is the passcode of Triangle O?+
The 8-digit passcode printed on Triangle O is 11489642.
Ancient Treasure
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