This Velociraptor Mutated and became a beast stronger then anything in arbs (Excluding Prefabs) But it is the Weakest mutant...

Goro found himself in a nuclear power plant fighting a hydra and the Nuclear power plant exploded and caused goro and the hydra to mutate into two powerful beasts (This unit is like kong)...

This hydra mutated and became the strongest mutant (So far)...

This Mammoth mutated and became a strong brute it's the 2nd weakest but has the most health...

This t rex mutated and became a creature similar to godzilla...