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 - $17.25
Near Mint Non-English - $17.25
Lightly Played - $16.50
Lightly Played Non-English - $16.50
Moderately Played - $13.75
Moderately Played Non-English - $13.75
Heavily Played - $10.50
Heavily Played Non-English - $10.50
Damaged - $8.75
Damaged Non-English - $8.75
Foil Prices
Near Mint Foil - $34.50
Near Mint Foil Non-English - $34.50
Lightly Played Foil - $32.75
Lightly Played Foil Non-English - $32.75
Moderately Played Foil - $27.75
Moderately Played Foil Non-English - $27.75
Heavily Played Foil - $20.75
Heavily Played Foil Non-English - $20.75
Damaged Foil - $17.25
Damaged Foil Non-English - $17.25