Mysterious Guard is a Common Flip Effect Monster from the 2020 Speed Duel: Battle City Box set, identified by card number SBCB-EN150.
2020 • Yu-Gi-Oh! • Speed Duel: Battle City Box
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| Condition | Value | Source | Trend | Price Details |
|---|---|---|---|---|
$1.08 | Guide Estimate | 0% | ||
Raw / Ungraded
TCGplayer Market (reference) · Guide Estimate evidence · captured Oct 26, 2026
Mysterious Guard enters the Speed Duel format as a Level 3 EARTH Spellcaster monster, featured in the 2020 Speed Duel: Battle City Box set. This card, cataloged as SBCB-EN150, serves as a foundational element for players building decks focused on rapid board presence and strategic flipping mechanics. As a Common rarity card, it is designed to be accessible to all collectors, making it an essential piece for completing the base set. The card’s Flip Effect Monster type introduces a unique gameplay dynamic, requiring players to manage the risk and reward of turning face-down monsters face-up. This mechanic is central to many Speed Duel strategies, where controlling the field through sudden shifts in board state can turn the tide of battle. Collectors interested in the tactical depth of Yu-Gi-Oh! Speed Duel will appreciate Mysterious Guard for its straightforward yet impactful role in various deck archetypes. Whether you are assembling a themed collection around Spellcaster monsters or focusing on the complete Speed Duel: Battle City Box release, Mysterious Guard provides a reliable and recognizable addition. Its EARTH attribute and Spellcaster type allow for flexible integration into broader Yu-Gi-Oh! Trading card game strategies, appealing to both new and veteran players. Collecting this card allows enthusiasts to explore the nuances of the Speed Duel variant, which emphasizes faster gameplay and distinct board layouts. The 2020 Battle City Box release marked a significant moment for the community, and owning cards from this period helps preserve the history of the format. For those who value the strategic diversity of Flip Effect Monsters, Mysterious Guard stands out as a key component in understanding the evolution of Speed Duel gameplay.
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The catalog profile below summarizes the card identity, featured subject, and notable collectible traits.
The core identity of the card within the set.
The subject, team, league, and sport context tied to this card.
Featured
Mysterious Guard
Game
Yu-Gi-Oh!
Rarity, print treatment, and game-specific stats for this card.
Common
Card Stock
English
Earth
Spellcaster
3
800 / 1200
Abilities, attacks, oracle text, and flavor text printed on the card.
FLIP: Target 1 face-up monster on the field, and if you control a face-up Warrior-Type monster, you can target 1 additional face-up monster on the field; return the first target to the top of the Deck, then return the additional target (if any) to the hand if you still control a face-up Warrior-Type monster.
FAQ
Mysterious Guard is a Flip Effect Monster with the Spellcaster type and EARTH attribute. It has a Level of 3, making it a low-level monster suitable for early-game plays in Speed Duel formats.
This card is from the Speed Duel: Battle City Box set, released in 2020. It carries the card number SBCB-EN150 and is classified as a Common rarity within this release.
As a Flip Effect Monster, Mysterious Guard is significant for its ability to change the board state by revealing its effect when flipped. This mechanic is crucial for many Speed Duel strategies that rely on surprise and rapid resource management.
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