According to data from Scryfall, 118 cards have the rat creature subtype
Rat Colony is very easy to cast, letting you flood the battlefield with Rat Colony copies easily, especially in the late game when you have a lot of mana to work with
However, if you look closer at the scenes, you'll see remnants of the Turtles that's because these scenes showcase parts of NYC where the Turtles were just at, disappearing into the night to be heroes, according to Frasier
Dropping one damage counter on every opposing character can have huge ramifications, especially with so many viable combinations of cards that affect already damaged characters
You only really need one chocobo to make it good, so I expect Ill be able to play this card more often than not