Magister Arnux is a Plumber who was stranded on a toxic planet called Terminus III. He was rescued by Ben, Rook, and Rad in Rad.
He wears a Plumber Suit with blue sunglasses similar to Bullfrag's. He has two metallic cylinders on his cheeks resembling Way Big's extra eyes.
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Ben 10: Omniverse
- According to Derrick J. Wyatt, Magister Arnux is not a Galvanic Mechamorph. The patterns seen on his armor are just circuitry powering it.
- Magister Arnux vaguely resembles Bullfrag with his physique, three-fingered hands and sunglasses.