These early trading cards featured various images and themes, such as animals, flowers, and famous people
As long as you arent putting too much stress on your colored mana sources or harming the engine of the deck, any plan you come up with should be reasonable at least
It also helps vastly improve your chances against Crashing Footfalls as it represents a set of 4/4 Rhinos provided it was not removed (which, granted, is unlikely to happen)
Many specific creature types (Elves, Dwarves, Giants, etc.) I grouped this as a single category, but when we were first made the list, we just wrote down a lot of creature types
You can only use this effect of "Grenosaurus Giga-Cannon" once per turn
This is almost a class of cards on their own