The War Lord

The War Lord was the leader of the War Lords who made an alliance with the War Chief to kidnap humans to participate in War Games.

Biography
After the interference of the Second Doctor, the War Lord was tried by the Time Lords and was sentenced to temporal dissolution. (TV: The War Games)

However, he was reconstructed by his people and went to the planet Karn, believing that the Sacred Flame was necessary for regeneration. The Doctor was sent by the Time Lords to stop him, and the War Lord was killed when he fell into the flame. (PROSE: Save Yourself)

Legacy
The War Lord fathered a son, to whom he was almost identical. His son followed in his footsteps as the joint leader of the Black Coven alongside the War Chief. (PROSE: Timewyrm: Exodus)

Alternate timeline
When the Doctor was removed from existence by, the War Lord was able to conquer the entire galaxy with his human army unopposed. (AUDIO: The Light at the End)