In my family’s D&D game, the BBET is called Thule or the Necromancer King. The Thule Apparition is one of its foot soldiers, very dangerous for low level adventurers, found protecting important sites but also the core of Thule’s growing army. They are built using the body and souls of prisoners—a horrible fate.
You can download a PDF of the Thule Apparition here.
This work includes material from the System Reference Document 5.2 (“SRD 5.2”) by Wizards of the Coast LLC, available at https://www.dndbeyond.com/srd. The SRD 5.2 is licensed under the Creative Commons Attribution 4.0 International License, available at https://creativecommons.org/licenses/by/4.0/legalcode.
The Barbarian Raider by Fraser Ronald and published by Sword’s Edge Publishing is licensed under the Creative Commons Attribution 4.0 International License, available at https://creativecommons.org/licenses/by/4.0/legalcode.