# 2021 Magic: The Gathering Mystery Booster Playtest Cards 2021 #48

> The 2021 Swarm of Locus from the Mystery Booster Playtest Cards series, a unique Magic: The Gathering release featuring the rare Insect Locus creature.

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## Identity

- **Year**: 2021
- **Manufacturer brand**: Magic: The Gathering
- **Set / series**: Mystery Booster Playtest Cards 2021
- **Card number**: #48
- **Product type**: TCG_CARD

## Description

The Swarm of Locus card, designated as number 48 in the 2021 Mystery Booster Playtest Cards set, offers a distinct experience for Magic: The Gathering enthusiasts. This rare creature, identified as an Insect Locus, features a mana cost of one black mana and one generic mana, resulting in a mana value of two. Designed by Emily Maltby, the card introduces a strategic mechanic where its power increases based on the number of Locus permanents a player controls, rewarding synergistic deck building. As a playtest card, this release provides insight into experimental game design before official expansion. Collectors often seek out Mystery Booster items for their historical significance within the Magic: The Gathering ecosystem. The card’s black color identity and flying ability make it a notable addition for those studying the evolution of creature types and mechanics. Understanding the context of the Mystery Booster series enhances the appreciation of these experimental designs.

## FAQ

### What is the Mystery Booster Playtest Cards series?

The Mystery Booster Playtest Cards series consists of experimental cards created for internal testing of Magic: The Gathering mechanics. These cards are not part of any standard expansion and are highly sought after by collectors for their rarity and design history.

### What abilities does the Swarm of Locus card have?

The Swarm of Locus is a Creature — Insect Locus with the flying ability. Its unique triggered ability allows it to gain +1/+0 power until end of turn for each Locus you control when it attacks.

### Who illustrated the Swarm of Locus card in the 2021 set?

The artwork for the Swarm of Locus card, number 48 in the 2021 Mystery Booster Playtest Cards, was created by artist Emily Maltby.

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Last verified: 2025-11-29.