Aggregor Alone

This is the eleventh episode of the series and first of the the second season of Ben 10 Cosmos Alliance.

Aggregor is wandering Mt. Rushmore finding for the Plumbers' Base hidden there. He started hurting people near the base. Gwen went there and used the spells: Tur-bo, Interdamotor Elaborator and Ocktoon. Aggregor was not damaged at all. Aggregor used his staff and bolted Gwen, making Gwen faint.

Aggregor finds the base, but is first found by Cention. So Cention defended the base as his property. Aggregor and Cention fought. When Gwen became conscious again, Ben and Kevin were there already, just spectating the fight between Aggregor and Cention. Aggregor said that nothing can stop him. He prefers to destroy and conquer alone. In rage he actually made Cention be defeated. Cention escaped.

Ben, Gwen and Kevin as well, went out of the picture. Aggregor shouts with pride that he doesn't need some alliance to join with. And then after that, he entered the base with an evil smile.

It is left offscreen what he did inside the base.