Card

Maester Seymour

Mana cost {2}{G}

Legendary Creature — Human Elf Cleric 1/3

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}{G}{G}: 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.)

Part of 4 known combos, one of them two-card. 4 official rulings.

Commander
Legal
Printing
Rare · FIC · #68
Cheapest printing
€0.33
EDHREC salt
0.37
Color identity
Green
Keywords
Monstrosity

Scryfall · EDHREC

Bracket

  • B1 Exhibition — Not in the same deck as its two-card combo partner: Sage of Hours
  • B2 Core — Not in the same deck as its two-card combo partner: Sage of Hours
  • B3 Upgraded — Not in the same deck as its early two-card combo partner: Sage of Hours
  • B4 Optimized — allowed: No restriction beyond the banned list
  • B5 cEDH — allowed: No restriction beyond the banned list

Why

  • Two-card combo with Sage of Hours (early with Sage of Hours)

How Lotus Vault estimates a bracket

Bracket: Lotus Vault analysis, with Commander Spellbook flags

Combos

4 known combos, one of them two-card.

Combos: Commander Spellbook

Rulings

  • 2025-06-06 · Wizards of the Coast
    The value of X is determined only once, as Maester Seymour's last ability resolves.
  • 2025-06-06 · Wizards of the Coast
    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 · Wizards of the Coast
    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 · Wizards of the Coast
    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: Scryfall · Wizards of the Coast

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