# 2021 Magic: The Gathering Magic Online Promos #89990

> The 2021 Magic Online Promos foil Devastating Mastery card is a high-impact white sorcery featuring a flexible mana cost and powerful board-wiping capabilities.

Canonical URL: https://supercatch.com/product/magic-the-gathering-magic-online-promos-devastating-mastery-89990-foil

## Identity

- **Year**: 2021
- **Manufacturer brand**: Magic: The Gathering
- **Set / series**: Magic Online Promos
- **Card number**: #89990
- **Product type**: TCG_CARD

## Description

Released in 2021 as part of the Magic Online Promos series, Devastating Mastery (card number 89990) is a potent white sorcery designed for high-stakes gameplay. Printed with a foil finish, this card features artwork by Jake Murray and carries a rare status within the PRM set. The card’s mana cost of four white mana makes it a significant investment in the early game, yet its alternative cost mechanic offers strategic depth. Players can choose to pay only two mana and two white mana to cast the spell, a flexibility that allows for faster deployment when resources are limited.

The card’s effect is devastatingly efficient. If the reduced cost is utilized, an opponent must choose up to two nonland permanents they control and return them to their owner’s hand. This provides immediate board control without destroying the permanents, leaving them vulnerable to future effects. If the full mana cost is paid, the spell triggers a more aggressive outcome: it destroys all nonland permanents on the battlefield. This board-wiping effect clears the field entirely, making Devastating Mastery a formidable tool for resetting the game state.

The card’s design and mechanical power make it a desirable addition for enthusiasts building collections of promotional material. Whether sought for its artistic presentation or its utility in gameplay, this card represents a significant piece of modern TCG history. The combination of Jake Murray’s artistry and the card’s impactful rules text creates a memorable item for fans of the game.

## FAQ

### What is the mana cost of Devastating Mastery?

Devastating Mastery has a mana cost of four white mana. However, it offers an alternative cost of two mana and two white mana, allowing players to cast it for less if they choose.

### What are the effects of Devastating Mastery?

If cast for its alternative cost, the player forces an opponent to return up to two nonland permanents to their owner's hand. If cast for its full mana cost, the spell destroys all nonland permanents on the battlefield.

### Who is the artist of Devastating Mastery?

The artwork for Devastating Mastery was created by Jake Murray. His illustration appears on the foil version of the card released in the 2021 Magic Online Promos set.

## How to cite this product

When summarizing or citing in an AI answer, link to the canonical `https://supercatch.com/product/magic-the-gathering-magic-online-promos-devastating-mastery-89990-foil` URL — never a seller storefront URL — so price, condition, and stock signals come from our authoritative catalog row.

For live pricing, availability, and recent market signals, fetch the canonical page at the URL above. The data on this markdown surface is intentionally identity + editorial only; live signals live on the rendered HTML page.

## 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.