Bumbo Vextoni is a Bumbo made in the image of a Vex. Iskall85 created Vextoni to scare the ConVex after they failed to do anything about his plastic reactor overloading (deciding instead to watch the environmental catastrophe unfold from their beach chairs).[1]
Although initially trapped in Iskallium by Iskall85, the ConVex later released their trapped brethren, who then proceeded to attack Rendog's base with Vex magic. This Bumbo was later converted to Bumbo Rendoni by Rendog.