Ben 10 Omniverse: Season 4, Episode 10

4 - 10: Max's Monster

Ben, Rook, and Grandpa Max have their hands full when Phil returns as a half-human half-Terroranchula creature as a side-effect of using the Nemetrix 5 years ago, and starts absorbing all of the electricity and lightning in Bellwood. But when he heads into Undertown's mini power-plant and starts to absorb the Megawatts, they must find a way to stop him. Ben is also suffering terrible luck with his transformations, turning into electric aliens that actually feed Phil's mutated form.