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Maester Seymour

Maester Seymour

Legendary Creature — Human Elf Cleric

Maester Seymour wants a deck that keeps making its creatures bigger turn after turn. It also works in a deck built around Clerics, Elves or Humans.

  • Mana cost2 genericgreen
  • Green ()
  • Power / toughness1 / 3
  • RarityRare

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 genericgreengreen: 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.)

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Archetypes
Themes

Cards That Fit Maester Seymour

Picked for what they do in Maester Seymour's deck. When two cards do the same job, the one with the lower comes first. All of them fit Maester Seymour's color identity.Mana ValueThe total amount of mana a card costs, all added up. A card costing two generic and one green has a mana value of three. Wizards renamed this from "converted mana cost" in 2021, so older cards and articles may still use the old name.Sol RingOpen the full glossary

plan6

The 6 Cards

Does what Maester Seymour does6

The 6 Cards

Rulings for Maester Seymour

explain how Maester Seymour works in tricky situations. They come from Wizards of the Coast, the company that makes Magic.RulingThe official answer to how a card works in a tricky situation. Most rulings are written by Wizards of the Coast, the company that makes Magic, and a few are notes from Scryfall, the card database Magic players use. A ruling explains a card. It does not change what the card says.Open the full glossary

Wizards of the Coast 6 Jun 2025

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.

Wizards of the Coast 6 Jun 2025

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.

Wizards of the Coast 6 Jun 2025

Once a creature becomes monstrous, it can't become monstrous again. If the creature is already monstrous when the monstrosity ability resolves, nothing happens.

Wizards of the Coast 6 Jun 2025

The value of X is determined only once, as Maester Seymour's last ability resolves.

4 rulings, all written by Wizards of the Coast. Read the originals on Gatherer ↗

Similar Commanders

Commanders that share the most with Maester Seymour, and what they share.

Color identityEvery color of mana symbol on a card, in its cost and in its rules text. Your commander's color identity sets the limit for your whole deck: every other card has to fit inside it. A deck led by a green and white commander cannot play a card with any blue in its color identity.Open the full glossaryGPlayers write colors as letters: G for green.+1/+1 Counters+1/+1 counter decks put small markers on their creatures that make each one permanently bigger, and keep adding more every turn. Each +1/+1 counter adds one to a creature's power (the damage it deals) and toughness (the damage it can take).Open the +1/+1 Counters pageCounter EngineAdds +1/+1 counters over and over rather than once. A counter here is a small permanent marker that raises a creature's power and toughness for good. It is not a counterspell, which is a different thing entirely. Something that adds them every turn makes your whole board bigger and keeps it that way. Hardened Scales, Corpsejack MenaceOpen the Counter Engine page+1/+1 CountersPuts +1/+1 counters on creatures, permanently raising their power and toughness. Unlike a temporary boost that wears off at end of turn, these markers stay put and stack up over a long game. Hardened Scales, The Great HengeOpen the +1/+1 Counters page