# 2022 Digimon Theme Booster Alternative Being #EX4-021

> GreyKnightsmon EX4-021 is a Level 6 Mega Virus-type Digimon from the 2022 Theme Booster Alternative Being set, featuring unique textured alternative art.

Canonical URL: https://supercatch.com/product/digimon-theme-booster-alternative-being-greyknightsmon-ex4-021-textured-alternative-art-sr

## Identity

- **Year**: 2022
- **Manufacturer brand**: Digimon
- **Set / series**: Theme Booster Alternative Being
- **Card number**: #EX4-021
- **Product type**: TCG_CARD

## Description

GreyKnightsmon EX4-021 stands as a formidable presence in the Digimon Card Game, originating from the 2022 Theme Booster Alternative Being expansion. This SR rarity card represents the Mega stage of the Dark Knight lineage, bringing significant strategic depth to decks focused on the Blue Flare and Twilight attributes. As a Virus-type Digimon, it occupies a pivotal role in the game's ecosystem, offering players robust defensive capabilities through its distinctive text effects.

The card’s design emphasizes its status as a high-level threat, requiring a substantial play cost of 12 to deploy. Once in play, GreyKnitsmon EX4-021 exerts control over the board by utilizing a De-Digivolve effect that targets an opponent's Digimon, followed by a deterrent that prevents lower-level threats from attacking. This makes it a valuable asset for disrupting opponent strategies during critical turns.

Beyond its gameplay mechanics, this card appeals to collectors for its textured alternative art treatment within the Theme Booster series. The visual presentation distinguishes it from standard prints, adding a layer of aesthetic value that resonates with fans of the franchise. Collectors often seek out this card number to complete their Theme Booster Alternative Being sets or to build specialized decks centered around Dark Knight Digimon.

For investors and hobbyists alike, the combination of its strategic utility and unique visual treatment makes GreyKnitsmon EX4-021 a notable entry in the Digimon TCG catalog. Its enduring popularity stems from both its mechanical strength and its representation of the franchise's rich lore. Whether you are looking to enhance your competitive play or expand your thematic collection, this card offers a compelling addition for any serious enthusiast of the Digimon universe.

## FAQ

### What attributes does GreyKnitsmon EX4-021 have?

GreyKnitsmon EX4-021 is a Blue and Black Virus-type Digimon with the Dark Knight, Blue Flare, and Twilight types.

### What is the play cost for GreyKnitsmon EX4-021?

The card requires a play cost of 12, reflecting its status as a Level 6 Mega Digimon with 12,000 DP.

### What unique effects does GreyKnitsmon EX4-021 possess?

On play, it de-digivolves an opponent's Digimon and prevents level 4 or lower Digimon from attacking. It also allows you to replay MetalGreymon or DarkKnightmon from its digivolution cards without cost when it would be deleted.

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## Companion files

- [llms.txt](https://supercatch.com/llms.txt) — site-level concise index.
- [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.

Last verified: 2025-11-29.