MAGIC: THE GATHERING
|Type:||Creature - Rat|
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.
Relentless Rats is the original card with the "you may have any number of these" clause on it, and is still probably the most powerful. Shadowborn Apostle and Rat Colony are cheaper, but overall less threatening than the original flavor.