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.
3GG: 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.)
NM-Mint Foil - $2.00
Lightly Played Foil - $1.80
Moderately Played Foil - $1.60
Heavily Played Foil - $1.40
Damaged Foil - $1.00
NM-Mint Foil Non English - $2.00
Lightly Played Foil Non English - $1.80
Moderately Played Foil Non English - $1.60
Heavily Played Foil Non English - $1.40
Damaged Foil Non English - $1.00