Tortoises

Tortoises are the most vile flying death machines ever created in the Alternate Umbrella Dimension. The reason they were made was to fight off legions of duckrabbits in a fight between Umbrellistan and Mycatisonfiristan. Only be using tortoises did the inhabitants of Umbrellistan defeat the hordes of duckrabbits and it all turned out swell. Oh, and by the way, no duckrabbits were hurt in the making of this article.