Expand common class give all Common Class Monsters a (Brother/Sister) thats have similar looks/traits to monsters already in that class but but has their own slight distinct look and traits but still similar to originals.

@Maurice-Davon This might be a nice addition early in the game, but later on you will not want them, because they will be taking up too much room.

I have to agree with @Kaiju I still got all my common + 3 of the Vintage collection but thats because im a hoarder ;),so as a collector I couldnt handle more commons