The 2021 Magic Online Promos card Devastating Mastery (#89990) is a six-mana-value white sorcery featuring an alternative cost mechanic and board-wiping effects.
2021 • Magic: The Gathering • Magic Online Promos
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Devastating Mastery is a rare sorcery card from the 2021 Magic Online Promos set, identified by card number 89990. Illustrated by Jake Murray, this white card requires a mana cost of {2}{W}{W}{W}{W} with a total mana value of six. The card introduces a strategic alternative payment option: players may choose to pay {2}{W}{W} instead of the full mana cost. When this reduced cost is paid, the card triggers a specific interaction where an opponent must select up to two nonland permanents they control and return them to their owner's hand. Regardless of the cost paid, the card's primary effect destroys all nonland permanents on the battlefield. This design creates a high-impact moment in the game, offering a decisive board state change for the caster. This 2021 Magic Online Promo card, Devastating Mastery, is a Rare Sorcery with a mana cost of {2}{W}{W}{W}{W}. The card belongs to the white color identity and functions as a standard sorcery within the game's rules. Its placement in the Magic Online Promos subset makes it a distinct item for completists and players interested in digital-to-physical crossover releases.
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The catalog profile below summarizes the card identity, featured subject, and notable collectible traits.
The core identity of the card within the set.
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Featured
Devastating Mastery
Game
Magic: The Gathering
Rarity, print treatment, and game-specific stats for this card.
Rare
Jake Murray
Card Stock
English
{2}{W}{W}{W}{W}
Sorcery
W
Abilities, attacks, oracle text, and flavor text printed on the card.
You may pay {2}{W}{W} rather than pay this spell's mana cost. If the {2}{W}{W} cost was paid, an opponent chooses up to two nonland permanents they control and returns them to their owner's hand. Destroy all nonland permanents.
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