Lord Heretic

Lord Heretic Thrash was an Equestrian Unicorn from the Second Windigo Ice Age and the rogue treasonous brother of Obsidious who left the kingdom after seeing how 'unnecessarily tame' his brother's methods were, founding his own tribe and using black magic to create a darker version of his brother's Windigo and Wechuge army tainted with black magic until being defeated by the founders of Equestria. Unlike his brother, he only became a minor Taraxippus. (TBC...)