
Maester Seymour
Legendary Creature — Human Elf Cleric
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.
: 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.)
1 / 3
Commander bracket
Derived from card traits, not a ruling — bracket rules turn on how a deck intends to use a card. Bracket rules
EDHREC
Combos 4
Commander recommendations
Top synergy 50
Played far more in this commander's decks than elsewhere.
- Gyre Sage
- Hardened Scales
- Inspiring Call
- Kami of Whispered Hopes
- Sphere Grid
- Forgotten Ancient
- Warden of the Grove
- Branching Evolution
- Terrasymbiosis
- The Earth Crystal
- Incubation Druid
- Tromell, Seymour's Butler
- Evolution Witness
- Arwen, Weaver of Hope
- Ozolith, the Shattered Spire
- Champion of Lambholt
- Ouroboroid
- Duskshell Crawler
- Innkeeper's Talent
- Kalonian Hydra
- Managorger Hydra
- Loading Zone
- Ornery Tumblewagg
- Rishkar, Peema Renegade
- Oran-Rief, the Vastwood
- Walking Ballista
- Benevolent Hydra
- Bugenhagen, Wise Elder
- The Ozolith
- Snakeskin Veil
- High Score
- Kodama of the West Tree
- Hydra's Growth
- Fangs of Kalonia
- Karn's Bastion
- Gaea's Gift
- Fight Rigging
- Giggling Skitterspike
- Goldvein Hydra
- Defiler of Vigor
- Silkguard
- Doubling Season
- Sazh Katzroy
- Mindless Automaton
- Bristly Bill, Spine Sower
- Devoted Druid
- Thickest in the Thicket
- Topiary Lecturer
- Court of Garenbrig
- Collective Resistance
Most included 50
Highest share of decks running them, distinctive or not.
- Forest
- Sol Ring
- Hardened Scales
- Gyre Sage
- Inspiring Call
- The Earth Crystal
- Forgotten Ancient
- Branching Evolution
- Kami of Whispered Hopes
- Sphere Grid
- Terrasymbiosis
- Warden of the Grove
- Llanowar Elves
- Elvish Mystic
- Incubation Druid
- Beast Within
- Snakeskin Veil
- Heroic Intervention
- Oran-Rief, the Vastwood
- Ozolith, the Shattered Spire
- Evolution Witness
- Champion of Lambholt
- Tromell, Seymour's Butler
- Emerald Medallion
- Rogue's Passage
- Cultivate
- Ouroboroid
- Arwen, Weaver of Hope
- Managorger Hydra
- Innkeeper's Talent
- Kalonian Hydra
- Duskshell Crawler
- Garruk's Uprising
- Rampant Growth
- Loading Zone
- Rishkar, Peema Renegade
- Defiler of Vigor
- The Ozolith
- Doubling Season
- Rishkar's Expertise
- Castle Garenbrig
- Gaea's Gift
- The Great Henge
- Mosswort Bridge
- Karn's Bastion
- Kodama of the West Tree
- Collective Resistance
- Walking Ballista
- Hydra's Growth
- Ornery Tumblewagg
Format legality
Rulings
- 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.
- 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
The value of X is determined only once, as Maester Seymour's last ability resolves.