Maester Seymour
Tracked across real Commander games played through TurnZero HQ.
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What it does
At the beginning of combat on your turn, put a number of +1/+1 counters equal to Maester Seymour's power on another target creature you control.
3: Monstrosity X, where X is the number of counters among creatures you control. (If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.)
Combos with Maester Seymour
The lines this card is part of, what it needs alongside it, and what the cards do together. An infinite result is the one that moves a deck's bracket.
- Sage of Hours Infinite
- Infinite turns
- Lock
- Crystalline Crawler Najeela, the Blade-Blossom Infinite
- Infinite creature tokens with haste
- Infinite colored mana
- Infinite combat phases
- Infinite +1/+1 counters on creatures you control
- Crystalline Crawler Hellkite Charger Infinite
- Infinite colored mana
- Infinite combat phases
- Infinite +1/+1 counters on creatures you control
- Crystalline Crawler Aggravated Assault Infinite
- Infinite colored mana
- Infinite combat phases
- Infinite untap of creatures you control
- Infinite mana creatures you control can produce
- Infinite +1/+1 counters on creatures you control
Combo data from Commander Spellbook, the community-maintained database of Magic combos. Mirrored nightly.
Rulings
4 official rulings, in the order Wizards published them.
- 2025-06-06
The value of X is determined only once, as Maester Seymour's last ability resolves.
- 2025-06-06
Once a creature becomes monstrous, it can't become monstrous again. If the creature is already monstrous when the monstrosity ability resolves, nothing happens.
- 2025-06-06
If Maester Seymour is no longer on the battlefield when its first ability resolves, use its power as it last existed on the battlefield to determine how many +1/+1 counters to put on the target creature.
- 2025-06-06
Monstrous isn't an ability that a creature has. It's just something true about that creature. If the creature stops being a creature or loses its abilities, it will continue to be monstrous.
Rulings are Wizards of the Coast's own, mirrored from Scryfall and refreshed nightly.
In the 99
Every deck whose current list includes Maester Seymour, whatever its commander.
Most played under
| Commander | Decks | Games | Win rate |
|---|---|---|---|
| Tidus, Yuna's Guardian | 3 | 0 | — |
| Tromell, Seymour's Butler | 1 | 2 | — |
Colors it shows up in
- Bant 3 decks
- Mono-Green 1 deck
Maester Seymour price history
The Final Fantasy Commander #68 printing, as Scryfall reports the TCGplayer market. Updated nightly. Click any version below to chart its price.
Every recorded price change
| Date | Non-foil |
|---|---|
| Oct 12, 2026 | $0.25 |
| Oct 11, 2026 | $0.25 |
| Oct 10, 2026 | $0.26 |
| Oct 8, 2026 | $0.27 |
| Oct 7, 2026 | $0.30 |
| Oct 6, 2026 | $0.29 |
| Oct 5, 2026 | $0.31 |
| Oct 3, 2026 | $0.33 |
| Oct 2, 2026 | $0.32 |
| Sep 30, 2026 | $0.31 |
| Sep 29, 2026 | $0.28 |
| Sep 28, 2026 | $0.26 |
A row is recorded only on nights the price moved, so each price held until the row above it.
Every version of Maester Seymour
2 printings, newest first. Prices are the market figures Scryfall publishes, refreshed nightly. A printing with no figure shows a dash rather than a zero, because Scryfall publishes none for some of them. Click a card's art to chart that version's price above.
Extended Art
- Normal
- $1.10
- Foil
- $6.90
- Normal
- $0.25
- Foil
- —
Prices from Scryfall, which tracks the TCGplayer and Cardmarket markets. They move daily and are a guide rather than a quote. Search TCGplayer for Maester Seymour. It runs a name search across every version, which covers the printings TCGplayer publishes no direct link to.
Aggregated from Commander games tracked in TurnZero HQ. Every figure counts decks and games only. No individual deck list, player or playgroup is identified. Win rates are withheld below 5 completed games, where the sample is too small to mean anything.
