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." —Mogg march
Near Mint - $22.60
Near Mint Non-English - $22.60
Lightly Played - $20.30
Lightly Played Non-English - $20.30
Played - $15.80
Played Non-English - $15.80
Heavily Played - $13.60
Heavily Played Non-English - $13.60
Damaged - $11.30
Damaged Non-English - $11.30
Foil Prices
Near Mint Foil - $34.70
Near Mint Foil Non-English - $34.70
Lightly Played Foil - $31.20
Lightly Played Foil Non-English - $31.20
Played Foil - $24.30
Played Foil Non-English - $24.30
Heavily Played Foil - $20.80
Heavily Played Foil Non-English - $20.80
Damaged Foil - $17.40
Damaged Foil Non-English - $17.40