# 2019 Magic: The Gathering Mystery Booster Playtest Cards 2019 #39

> The collectible details for Corrupted Key, card 39 from the 2019 Magic: The Gathering Mystery Booster Playtest series by artist Tom Wänerstrand.

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## Identity

- **Year**: 2019
- **Manufacturer brand**: Magic: The Gathering
- **Set / series**: Mystery Booster Playtest Cards 2019
- **Card number**: #39
- **Product type**: TCG_CARD

## Description

Corrupted Key stands as a unique artifact within the Magic: The Gathering Mystery Booster Playtest Cards 2019 series. As card number 39 in this experimental set, this rare black artifact offers collectors a glimpse into the iterative design process behind future mechanics. The card features a mana cost of one black mana and functions as a Key subtype, providing a potent effect: as long as it remains tapped, creatures you control gain both menace and deathtouch. This combination of keywords makes it a strategic piece for understanding the power level of early playtest iterations.

Designed by Tom Wänerstrand, the card represents a specific moment in the evolution of Magic: The Gathering trading card game design. The Mystery Booster Playtest Cards 2019 set was not intended for standard play but served as a testing ground for new concepts. For collectors focused on the history of the brand, this release provides valuable context on how abilities like menace and deathtouch were balanced before official printing. The product is categorized by its distinct set code, CMB1, and its status as a rare print within the playtest lineup. Enthusiasts who track the development of artifact mechanics often look to this era to see how designers experimented with key-based interactions. Understanding the role of Corrupted Key helps clarify the broader narrative of the 2019 playtest series and its influence on the game's ongoing legacy.

## FAQ

### What does Corrupted Key do in Magic: The Gathering?

Corrupted Key grants all creatures you control the keywords menace and deathtouch as long as it is tapped. It costs one black mana to cast and is classified as an Artifact — Key.

### Is Corrupted Key from the Mystery Booster Playtest Cards 2019 set official?

No, cards from the Mystery Booster Playtest Cards 2019 series were created for internal testing and design feedback. They are not legal for standard tournament play but are valuable for collectors tracking design history.

### Who is the artist of the Corrupted Key card?

The artwork for card number 39 in the CMB1 set was created by Tom Wänerstrand, known for his work on various Magic: The Gathering releases.

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Last verified: 2025-11-29.