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."
Near Mint Foil - £25.60
Lightly Played Foil - £21.80
Moderately Played Foil - £18.00
Heavily Played Foil - £12.80
Damaged Foil - £7.70
Near Mint Foil Non English - £25.60
Lightly Played Foil Non English - £21.80
Moderately Played Foil Non English - £18.00
Heavily Played Foil Non English - £12.80
Damaged Foil Non English - £7.70