The V38 assault fighter served as the basis for the TIE Phantom.
Design-wise, it was unique among TIE Series starfighters, as the quadanium steel solar panel wings attached directly to the hull instead of via pylons. The hull/cockpit itself was non-spherical, compared to other TIEs, though it was similar to the Scimitar assault bomber.
The V38 was developed by the Galactic Empire during the Galactic Civil War on the planet Imdaar. This type of starfighter was familiar to Admiral Gial Ackbar, who was able to identify it after viewing footage of TIE Phantoms in action.