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
NM-Mint Foil - $21.60
NM-Mint Foil Non English - $21.60
Lightly Played Foil - $20.50
Lightly Played Foil Non English - $20.50
Moderately Played Foil - $19.40
Moderately Played Foil Non English - $19.40
Heavily Played Foil - $17.30
Heavily Played Foil Non English - $17.30
Damaged Foil - $14.00
Damaged Foil Non English - $14.00