Concepts of Koschei the Deathless by Nikolai Mamashev Posted on January 13, 2015June 8, 2017 by Konstantin Dmitriev Last weeks Nikolai Mamashev have been intensively researching the main villain of Morevna series – Koschei the Deathless. Here we would like to share some concepts made by Nikolai. Related Liked it? Take a second to support us on Patreon! Posted in Anime, Episode 3, Morevna 3D.