Relentless Rats gets +1/+1 for each other creature on the battlefield named Relentless Rats. A deck can have any number of cards named Relentless Rats.
Near Mint - $4.10
Lightly Played - $3.70
Played - $2.90
Heavily Played - $2.50
Damaged - $2.10
Near Mint Non-English - $4.10
Lightly Played Non-English - $3.70
Played Non-English - $2.90
Heavily Played Non-English - $2.50
Damaged Non-English - $2.10