The Plumbers are shown housing an injured creature known as a Psycholeopterran, which has the ability to hypnotize its prey—a power that Ben accidentally experiences.
The episode features a significant flashback where a younger Ben, Gwen, and Grandpa Max visit Mount Rushmore , which is revealed to be a fully functioning Plumber base . [S1E15] Malefactor
is the 15th episode of Season 1 of the animated series Ben 10: Omniverse . Episode Summary The Plumbers are shown housing an injured creature
In this flashback, younger Ben encounters Malware , a corrupted Galvanic Mechamorph who attacks the base and absorbs Plumber weaponry. and Grandpa Max visit Mount Rushmore
The episode includes action sequences featuring some of Ben's signature transformations, such as Humungousaur and Spidermonkey .