# 2020 Magic: The Gathering Magic Online Promos #80859

> A 2020 Magic Online Promo card featuring the legendary Demon Kraken Gyruda, Doom of Depths. This rare card introduces the unique Companion mechanic for deck building.

Canonical URL: https://supercatch.com/product/magic-the-gathering-magic-online-promos-gyruda-doom-of-depths-80859

## Identity

- **Year**: 2020
- **Manufacturer brand**: Magic: The Gathering
- **Set / series**: Magic Online Promos
- **Card number**: #80859
- **Product type**: TCG_CARD

## Description

Gyruda, Doom of Depths stands out in the Magic Online Promos collection as a formidable six-mana legendary creature with the Demon and Kraken subtypes. Released in 2020, this rare card invites collectors to appreciate its complex rules interaction, which centers on the Companion mechanic. This ability allows players to choose the card as their companion, enabling them to cast it from outside the game for three mana, provided their starting deck contains only cards with even mana values.

When Gyruda, Doom of Depths enters the battlefield, it triggers a significant effect: every player mills four cards. From among those milled cards, the controller may put a creature card with an even mana value onto the battlefield under their control. This interaction creates strategic depth, rewarding players who build decks with precise mana value counts.

For collectors, this promo card represents a specific moment in the game's history where new mechanics were introduced to expand strategic possibilities. The combination of its high mana cost, powerful enter-the-battlefield effect, and the unique Companion restriction makes it a fascinating study in game design. Collectors often seek out these promo cards to complete their sets or to appreciate the innovative mechanics that define various eras of the game. Gyruda, Doom of Depths remains a key part of the Magic Online Promos series, offering both aesthetic appeal and mechanical intrigue. Whether you are building a themed collection or studying the evolution of game rules, this card provides a compelling look at how even mana values can shape gameplay dynamics.

## FAQ

### What is the Companion mechanic in Magic: The Gathering?

The Companion mechanic allows a player to choose a specific card to keep outside the game. If that card is chosen, the player can cast it from outside the game for a specified cost, provided they meet certain deck-building restrictions.

### What are the subtypes of Gyruda, Doom of Depths?

Gyruda, Doom of Depths has two subtypes: Demon and Kraken. As a legendary creature, it follows specific rules regarding multiple copies and enters the battlefield with its associated abilities.

### What does the mill ability do on this card?

When Gyruda, Doom of Depths enters the battlefield, each player mills four cards. The controller then chooses a creature card with an even mana value from among those milled cards and puts it onto the battlefield under their control.

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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.