# 2021 Digimon BOOSTER DOUBLE DIAMOND #BT6-039

> Mammothmon (BT6-039), a Level 5 Ultimate Vaccine Digimon from the 2021 Double Diamond expansion of the Digimon Card Game.

Canonical URL: https://supercatch.com/product/digimon-booster-double-diamond-mammothmon-bt6-039-c

## Identity

- **Year**: 2021
- **Manufacturer brand**: Digimon
- **Set / series**: BOOSTER DOUBLE DIAMOND
- **Card number**: #BT6-039
- **Product type**: TCG_CARD

## Description

Mammothmon (BT6-039) stands as a resilient presence within the Double Diamond expansion of the Digimon Card Game, released in 2021. As a Level 5 Ultimate Ancient Animal-type Digimon, this card brings significant tactical depth to any deck strategy. Carrying the Vaccine attribute and colored in Yellow, it fits seamlessly into archetypes that prioritize defensive stability and board control. The card’s design is anchored by a distinct inherited effect that activates every turn. While you hold three or fewer security cards, Mammothmon gains a substantial +1000 DP boost. For collectors who appreciate cards with strategic utility beyond simple stat lines, this interaction adds a layer of engagement that defines the Double Diamond era. Whether you are building a competitive deck or assembling a comprehensive set, finding key cards like Mammothmon is essential for any serious hobbyist. The Double Diamond set remains a favorite among fans for its innovative mechanics and diverse character roster, making each card a valuable piece of the game's evolving history. Owning a copy of BT6-039 allows you to experience the strategic nuances of the 2021 release firsthand. The card’s ability to scale its power based on your security stack provides a dynamic gameplay element that keeps matches exciting. For those interested in the broader ecosystem of the Digimon Card Game, this card represents a solid example of the design philosophy present in the Double Diamond series. It serves as a reliable anchor for players who enjoy defensive playstyles, ensuring that even when under pressure, their key units remain formidable.

## FAQ

### What type of Digimon is Mammothmon?

Mammothmon is a Level 5 Ultimate Ancient Animal-type Digimon with the Vaccine attribute. It costs 5 memory to play and has a base DP of 6000.

### How does Mammothmon's inherited effect work?

While you have three or fewer security cards, Mammothmon gains +1000 DP every turn. This effect is always active and does not require activation.

### Which set is Mammothmon BT6-039 from?

This card is part of the Double Diamond expansion (BT6), released in 2021 for the Digimon Card Game.

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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.