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.)
"Hup, two, three, four,
Dunno how to count no more."
Near Mint - $16.100
Lightly Played - $12.900
Moderately Played - $11.300
Heavily Played - $9.700
Damaged - $8.100
Near Mint Spanish - $16.100
Lightly Played Spanish - $12.900
Moderately Played Spanish - $11.300
Heavily Played Spanish - $9.700
Damaged Spanish - $8.100
Foil Prices
Near Mint Foil - $29.700
Lightly Played Foil - $23.800
Moderately Played Foil - $20.800
Heavily Played Foil - $17.900
Damaged Foil - $14.900
Near Mint Foil Spanish - $29.700
Lightly Played Foil Spanish - $23.800
Moderately Played Foil Spanish - $20.800
Heavily Played Foil Spanish - $17.900
Damaged Foil Spanish - $14.900