Wyvern

A peculiar creature created by the TCHP to serve as an aerial assault troop, Wyverns dart about the skies aimlessly, searching for enemies.

Appearance.
The Wyvern's name paints a deceptive picture of a powerful and majestic creature. In reality, it is a hideous gas sack, having odd wings like those of a bat. Its body is made of a thin rubbery membrane, inside which it carries three smaller sacks, Two of which contain a lighter than air substance and a larger central one containing the highly combustible vapor it uses to produce flame.