An incarnation of the Master opposed the Doctor in a multi-sided battle for control of the universe, with the Doctor, the Master, Davros and a Cyber-Controller all vying for control of artifacts and locations which would make them masters of the cosmos.
Physical appearance and clothing
The Master had a long, brown, shaggy beard and hair. His skin was pale and sickly-looking, with green highlights reflected in the dark, formless robe-like garment he wore. He also displayed a large metal pendant or medallion, possibly a clasp for his cloak, on his chest. (NOTVALID: Battle for the Universe)