Mass Diminish

Mass Diminish card image

Mass Diminish: Sorcery, Commander 2019. Until your next turn, creatures target player controls have base power and toughness 1/1. Flashback 3U. On Mana Grove.

Mana cost
{1}{U}
Mana value
2
Type
Sorcery
Colour identity
Blue (U)
Rarity
Rare
Set
Commander 2019 (C19)
Released
2019-08-23
Collector number
10
Artist
E. M. Gist
Commander rank
8,900 (by how often it appears in Commander decks)
Keywords
Flashback

Build around this card with Grover

About Mass Diminish

Mass Diminish is a Magic: The Gathering card, a rare blue sorcery from Commander 2019 (C19), a Commander product released in August 2019. It is collector number 10 in that set, with art by E. M. Gist. It costs {1}{U} (one generic and one blue mana) to cast, for a mana value of 2. Its colour identity is blue. It is legal in Legacy, Vintage, Commander, Duel Commander and Oathbreaker. Commander 2019 is its only printing so far. The latest aggregated market price for this printing is $0.59 (normal finish, as of 2026-11-12).

Card text

Until your next turn, creatures target player controls have base power and toughness 1/1.

Flashback {3}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Transformed from brute to cute.

Market price

Latest aggregated market price for the normal finish of this printing: $0.59 (as of 2026-11-12).

The figure covers this printing only; other printings carry their own price on their own page.

Format legality

Legality of Mass Diminish by format. Formats in which it is not legal are not listed.

LegacyLegal
VintageLegal
CommanderLegal
Duel CommanderLegal
OathbreakerLegal

Official rulings

The 8 most recent official rulings for Mass Diminish, newest first.

  • You can cast a spell using flashback even if it was somehow put into your graveyard without having been cast.
  • A spell cast using flashback will always be exiled afterward, whether it resolves, is countered, or leaves the stack in some other way.
  • If a card with flashback is put into your graveyard during your turn, you can cast it if it's legal to do so before any other player can take any actions.
  • To determine the total cost of a spell, start with the mana cost or alternative cost (such as a flashback cost) you're paying, add any cost increases, then apply any cost reductions. The mana value of the spell is determined only by its mana cost, no matter what the total cost to cast the spell was.
  • "Flashback [cost]" means "You may cast this card from your graveyard by paying [cost] rather than paying its mana cost" and "If the flashback cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack."
  • You must still follow any timing restrictions and permissions, including those based on the card's type. For instance, you can cast a sorcery using flashback only when you could normally cast a sorcery.
  • Effects that raise or lower a creature's power and/or toughness, such as the effect of Titanic Growth, will apply to that creature no matter when they started to take effect. The same is true for any counters that change its power and/or toughness.
  • In a multiplayer game, if you leave the game after Mass Diminish resolves but before your next turn begins, its effect lasts until your next turn would have begun. It neither expires immediately nor lasts indefinitely.

Similar cards

Other sorcery cards with a blue colour identity, ranked by how often they appear in Commander decks.

Explore Mana Grove