Maester Seymour
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Build around Maester Seymour as your commander →
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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.)
What it does
Tagged as +1/+1 counters — the jobs the deck report counts it toward.
Get it in a precon
One preconstructed deck includes this card.
Official rulings
- 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. (2025-06-06)
Printings & prices
Every set Maester Seymour has been printed in, with the art, the finishes and the market price of each — the headline price above is the cheapest of these.
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