Sigmund is a dragonborn sorcerer. He often mentions his wife, Harriet and a daughter Evelyn he has left back in the foreign plane of Ravnica. He has a scar across his chest from an attack which gave him his sorcerous powers. The attack was by Unnar the Eater of All while Sigmund was posted to defend Hator, the Gentle Mind.
Unnar hit Sigmund with a lightning bolt, triggering his sorcerous powers. Hator banished Unnar from Ravnica, but Sigmund was later sent to put an end to Unnar once and for all.
Sigmund must finish his quest to help Mordenkainen to return to his origin plane and be reunited with his family. Siugnumd is played by Nate.