Enchant creature
Enchanted creature gets +X/+Y, where X is half the number of Forests you control, rounded down, and Y is half the number of Forests you control, rounded up.
Near Mint - $7.50
Near Mint Non-English - $7.50
Lightly Played - $6.80
Lightly Played Non-English - $6.80
Played - $5.30
Played Non-English - $5.30
Heavily Played - $4.50
Heavily Played Non-English - $4.50
Damaged - $3.80
Damaged Non-English - $3.80