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 Foil - £15.30
Lightly Played Foil - £13.00
Moderately Played Foil - £10.70
Heavily Played Foil - £7.60
Damaged Foil - £4.60
Near Mint Foil Non English - £15.30
Lightly Played Foil Non English - £13.00
Moderately Played Foil Non English - £10.70
Heavily Played Foil Non English - £7.60
Damaged Foil Non English - £4.60