This article describes a custom creation, custom theme, or other fan material, made by a Brickipedia contributor. It has never been, is not, and will not be officially released.
Seba NightFlyer vs. Smoke Demon is a small battle builders set for the atomist
This set is very small, containing only 3 minifigures and a transformation chamber made to look like rock. On one side of the rock is Seba's normal variant, while one the other side is his winged variant. The rock can spin to simulate Seba transforming from normal to winged.