Tornedron

Untold eons after his most powerful creation, Unicron, rebelled and nearly destroyed him, the immortal mad scientist, Primacron, decided to have another go at it. This time, he created a monster entirely of energy. The result was Tornedron, a being capable of taking any form it chooses and can suck all manner of energy from anything in the known galaxy.

Its first initial form it took, beyond its energy form, was that of a monstrous spidery creature. It was also capable of splitting its form into numerous pieces if forced to hunt different prey and then reforming. Tornedron is also shown to take the form of a dragon, a tiger, a three-headed serpent, an unspecifed creature, and a dinosaur that looks like a hybrid of the Dinobots' animal forms.