Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it. (For example, if two Goblin Warriors and a Goblin Shaman are on the battlefield, each gets +2/+2.)
"Is that your coat of arms? Looks more like a shawl of branches to me!"
—Andreas the Imprudent, last words
Near Mint - $17.700
Lightly Played - $14.200
Moderately Played - $12.400
Heavily Played - $10.600
Damaged - $8.900
Near Mint Spanish - $17.700
Lightly Played Spanish - $14.200
Moderately Played Spanish - $12.400
Heavily Played Spanish - $10.600
Damaged Spanish - $8.900