The lore and mechanics of Protective Soul Ailin, the LIGHT Fairy Union Monster from the 2007 Dark Revelation Volume 4 set.
Protective Soul Ailin
2007 • Yu-Gi-Oh! • Dark Revelation Volume 4
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Market & Price History
| Condition | Value | Source | Trend | Price Details |
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$1.71 | Guide Estimate | 0% | ||
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30-day Price History
Raw / Ungraded
TCGplayer Market (reference) · Guide Estimate evidence · captured Sep 30, 2026
Description
Protective Soul Ailin, identified by the catalog number DR04-EN024, is a distinct entry within the Yu-Gi-Oh! Trading card game landscape. Released in 2007 as part of the Dark Revelation Volume 4 expansion, this card represents a specific era of game design where Union monsters were being integrated into various strategies. As a Fairy-type creature with a LIGHT attribute, it occupies a unique niche that appeals to collectors interested in the thematic diversity of the game's monster archetypes. The card functions as a Level 1 Union Effect Monster. In the context of the Yu-Gi-Oh! Mechanics, Union monsters are notable for their ability to attach to other monsters, enhancing their capabilities. While Protective Soul Ailin is printed with a Common rarity, its value to enthusiasts often lies in its role within the broader ecosystem of the game rather than just its scarcity. Collectors seeking to complete the Dark Revelation Volume 4 set will find this card an essential component of the series' narrative and mechanical completeness. For hobbyists building collections, cards like Protective Soul Ailin serve as tangible links to the evolution of the Yu-Gi-Oh! TCG. They represent the creativity of the developers and the artistic direction of the mid-2000s. Whether you are an investor in the hobby, a player looking to understand the historical context of Union strategies, or simply a fan of the franchise, this card offers insight into the game's rich history. By examining cards from sets like Dark Revelation Volume 4, collectors can appreciate the detailed world-building that has sustained the game's popularity for decades.
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Card Details
The catalog profile below summarizes the card identity, featured subject, and notable collectible traits.
Catalog Profile
The core identity of the card within the set.
Featured Subject
The subject, team, league, and sport context tied to this card.
Featured
Protective Soul Ailin
Game
Yu-Gi-Oh!
TCG Attributes
Rarity, print treatment, and game-specific stats for this card.
Common
Card Stock
English
Light
Fairy
1
0 / 0
Card Text
Abilities, attacks, oracle text, and flavor text printed on the card.
Once per turn, you can equip this card to an "Indomitable Fighter Lei Lei" you control, OR unequip it to Special Summon this card in face-up Attack Position. When equipped to a monster by this card's effect, you can change that monster's battle position once per turn. (A monster can only be equipped with 1 Union Monster at a time. If the equipped monster would be destroyed by battle, destroy this card instead.)










