What does Maester Seymour do in Magic: The Gathering?

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.)

Maester Seymour | Final Fantasy Commander

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.)

USD: $9.86-$12.12

96.55%

USD: $0.20-$0.85

77.95%

USD: $0.15-$0.50

11.65%

USD: $14.51-$12.27

99.04%

USD: $0.94-$1.79

98.40%

USD: $6.63-$8.26

98.08%

USD: $0.90-$0.75

97.78%

USD: $0.17-$0.48

97.52%

USD: $0.51-$0.58

97.51%

USD: $4.85-$4.42

97.42%

USD: $19.19-$20.25

97.41%

USD: $45.45-$47.57

97.22%

USD: $2.36-$6.17

96.94%

USD: $43.63-$50.22

96.92%

USD: $20.93-$21.10

96.67%

USD: $1.76-$4.45

83.36%

Illustrated by Norikatsu Miyoshi

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 • wotc

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 • wotc

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

2025-06-06 • wotc

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 • wotc

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