Plague Rats has power and toughness each equal to the number of Plague Rats in play, no matter who controls them. For example, if there are two Plague Rats in play, each has power and toughness 2/2.
Near Mint - $0
Lightly Played - $0
Moderately Played - $0
Heavily Played - $0
Damaged - $0
Near Mint Spanish - $0
Lightly Played Spanish - $0
Moderately Played Spanish - $0
Heavily Played Spanish - $0
Damaged Spanish - $0