Triangle O

Maze of Millennia MZMI-EN020 • rare

Set: Maze of Millennia
Printing code: MZMI-EN020
Rarity: Rare
Card type: Spell

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38,297cards in the catalog

1other printing of this card

Market

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Lore

Why it matters

As a rare spell card from the Maze of Millennia set, Triangle O serves as a specialized tool for players looking to manipulate their field. Its status as a rare entry makes it a distinct component for those seeking to refine the mechanical consistency of their deck.

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Provenance

Where it came from

Triangle O was introduced in the Yu-Gi-Oh! Trading Card Game set Maze of Millennia, released in early 2024. This set served as a compilation of cards previously released only in the Japanese OCG or featured in the animated series, aiming to bridge the gap between regional card pools and provide support for legacy archetypes that had been neglected for years.

The card is designed to support the Harpie archetype, specifically facilitating the summoning of Harpie Lady Sisters. Its visual design features the signature aesthetic of the Maze of Millennia set, which prioritizes thematic utility for niche strategies. Like many cards in this release, it was designed to modernize older playstyles, receiving moderate interest from collectors focused on completing the Harpie-related card library.

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Other printings

Others named Triangle O

Same name, different printings and different cards — these sources have no shared id tying a reprint to its original.

Triangle O25th Anniversary Tin: Dueling Mirrors · #MP24-EN273 · ultra-rare—

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About

About Triangle O

Triangle O is a card in the Yu-Gi-Oh! catalog on collecto.rs. Maze of Millennia MZMI-EN020 • rare. Catalog data is sourced from YGOProDeck. No collectors on collecto.rs publicly track this card yet — adding yours would make you the first.

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Where does the Triangle O catalog entry come from?

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