Ohthere Wyrdmake was a Rune Priest of the Space Wolves Legion during the Great Crusade and Horus Heresy eras in the late 30th and early 31st Millennia. He befriended Ahriman, Chief Librarian of the Thousand Sons Legion, during the Aghoru Campaign in order to learn more about the XV Legion's sorcery. Wyrdmake used this information to speak out against the Imperium's use of Librarians at the Council of Nikaea. He was killed by First Captain Ahzek Ahriman after the Space Wolves assaulted the XV Legion's homeworld of Prospero during the Fall of Prospero. When they met on the field, Ahriman used his sorcery to not only kill Wyrdmake physically but to annihilate his soul before it could pass into the Warp.