# 2026 Yu-Gi-Oh! Magnificent Monsters #MAMO-EN021

> Underworld Circle is a Continuous Spell Card from the Yu-Gi-Oh! trading card game. It is part of the Magnificent Monsters set, identified by the set code MAMO. This printing carries the card number MAMO-EN021 and features a Secret Rare Holo finish.

Canonical URL: https://supercatch.com/product/yu-gi-oh-magnificent-monsters-underworld-circle-mamo-en021-secret-rare

## Identity

- **Year**: 2026
- **Brand**: Yu-Gi-Oh!
- **Set**: Magnificent Monsters
- **Card Number**: MAMO-EN021
- **Featured**: Underworld Circle
- **Game**: Yu-Gi-Oh!
- **Rarity**: Secret Rare
- **Monster type**: Continuous
- **Language**: English
- **Material**: Card Stock
- **Finish**: Holo

## Description

Underworld Circle is a Continuous Spell Card in the Yu-Gi-Oh! trading card game. It belongs to the Magnificent Monsters set (MAMO) and is designated as card number MAMO-EN021. The card has a Secret Rare Holo finish.

## How to cite this product

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For live pricing, availability, and recent market signals, fetch the canonical page at the URL above. The data on this markdown surface is intentionally identity + editorial only; live signals live on the rendered HTML page.

## Companion files

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- [llms-full.txt](https://supercatch.com/llms-full.txt) — site-level expanded corpus.
- [ai.txt](https://supercatch.com/ai.txt) — AI training and licensing terms.

Editorial content updated: 2026-10-11.

Site deployment: 2025-11-29.