For days Megatronus had heard that voice in his head. He'd tried hard to shut it out, listening instead to the soothing sparkbeat of Cybertron's core. He knew what the voice meant and resisted the rising urge to return to Earth. That planet was more than meets the eye. It was dangerous, it was a death trap. It was the Chaos Bringer in disguise. And he, Megatronus, was a servant being called back to his master. But still he resisted.
The voice rose in intensity until it was nearly deafening. A low hum at first until it began to form words.
"Come."
Megatronus shook his helm. "No." He growled, focusing more intently than ever on Primus' sparkbeat. But its soothing noise slowly faded into the background.
"With."
Megatronus screamed as Unicron took control. His body changed. The blue highlights in his black armor were replaced with purple and his once bright blue optics glowed a sickening violet. Cybertron faded into a dull echo in the back of the Prime's mind as he transformed and heeded the call to Earth. To his master.
"Me."