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 - £14.10
Lightly Played - £12.00
Moderately Played - £9.90
Heavily Played - £7.10
Damaged - £4.30
Near Mint Non English - £14.10
Lightly Played Non English - £12.00
Moderately Played Non English - £9.90
Heavily Played Non English - £7.10
Damaged Non English - £4.30
Foil Prices
Near Mint Foil - £40.00
Lightly Played Foil - £34.00
Moderately Played Foil - £28.00
Heavily Played Foil - £20.00
Damaged Foil - £12.00
Near Mint Foil Non English - £40.00
Lightly Played Foil Non English - £34.00
Moderately Played Foil Non English - £28.00
Heavily Played Foil Non English - £20.00
Damaged Foil Non English - £12.00