The Fell God (邪神, Jashin lit. Evil God in the Japanese Version) is an enemy-only combat class that is exclusive to Fire Emblem Gaiden and Fire Emblem Echoes: Shadows of Valentia. The personal class of Duma, one of the sibling gods overseeing the continent of Valentia and the final boss of Gaiden and Echoes, the Dark God class resembles a swamp monster and attacks with tentacles and beams from its eyeballs. Attacks performed by the class with the Eyebeam and Oculus are considered to be magical.
It should be noted that the Fell God class cannot be defeated without the use of the Falchion wielded by Alm. It will not sustain damage past 52 HP with ordinary weapons, save for Nosferatu.