Bran Mak Morn is the last great king of the Picts, leading a dwindling people against the legions of Rome in occupied Britannia. A tragic leader willing to pay any price for his people's survival, he does not flinch from alliances with forbidden powers.
In Howard's "Worms of the Earth," Bran summons primordial subterranean beings to exact vengeance upon a Roman governor. His stories tie Howard's Pictish mythology to the worship of Yig and lay the genealogical groundwork for the Picts of the Conan era.