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."
NM-Mint - $17.00
Lightly Played - $15.30
Moderately Played - $13.60
Heavily Played - $11.90
Damaged - $8.50
NM-Mint Non English - $17.00
Lightly Played Non English - $15.30
Moderately Played Non English - $13.60
Heavily Played Non English - $11.90
Damaged Non English - $8.50