Madrigor

Madrigor was a rogue Time Lord. He was the youngest on Gallifrey to ever be appointed a Time Lord. Madrigor was greedy, however, and used his powers for his own ends, and not for the greater good. Eventually the Time Lords found out that he had been traveling through time and space to other planets and stealing from them. He was tried for his crimes, but never punished, able to escape before his sentence was carried out. (PROSE: The Time Thief)