# 2020 Magic: The Gathering Core Set 2021 #266

> The Swamp from Magic: The Gathering's Core Set 2021 (M21, card #266) is a common basic land card illustrated by Mike Bierek, serving as a primary source of Black mana.

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## Identity

- **Year**: 2020
- **Brand**: Magic: The Gathering
- **Set**: Core Set 2021
- **Card Number**: 266
- **Featured**: Swamp
- **Game**: Magic: The Gathering
- **Rarity**: Common
- **Type**: Basic Land — Swamp
- **Language**: English
- **Material**: Card Stock
- **Finish**: Normal

## Description

The Magic: The Gathering Core Set 2021 release, identified by the set code M21, includes the Swamp as card number 266 in its base checklist. This common basic land card features artwork by Mike Bierek and serves a fundamental mechanical purpose in the game by providing Black mana. As a Basic Land type, it does not have a mana value and functions without relying on specific set mechanics or complex rules text beyond its standard ability to produce one Black mana symbol when tapped. Collectors who focus on the Core Set 2021 expansion often target this card to complete the full set of basic lands available in the print run. The card’s straightforward design and essential role in deck construction make it a staple for players who build strategies centered on Black mana acceleration. While the card itself is a common rarity, its presence is critical for any deck that requires reliable mana sources. As a Basic Land — Swamp from the Core Set 2021, this card provides black mana production for Magic: The Gathering gameplay. Acquiring this card helps ensure that your collection remains comprehensive and visually consistent with the rest of the M21 lineup.

## FAQ

### What is the set code for the Core Set 2021 Magic card?

The set code for the Magic: The Gathering Core Set 2021 is M21. This code is used to identify cards from this 2020 release in databases and collector catalogs.

### Who is the artist for the Core Set 2021 Swamp card?

Mike Bierek is the credited artist for the Swamp card in the Core Set 2021 expansion. His artwork appears on card number 266 of the set.

### What mana does the Core Set 2021 Swamp produce?

The Swamp from Core Set 2021 is a Basic Land that produces Black mana. When tapped, it adds one Black mana symbol to the player's mana pool, which is essential for casting Black spells.

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Editorial content updated: 2026-10-05.

Site deployment: 2025-11-29.