Wrath

The Wrath were a race of warriors created by Kylo Sorsha.

While stranded on the planet Sharnax with a group of igris, a savage slave race created by the Drashani Empire, Kylo used his psychic abilities to discover that the igris were once people whose bodies were altered through experimentation while their higher brain functions were distilled away and their psyches ripped from their bodies. He was able to discover that their psyches ended up in another dimension known as the Undervoid and, using his powers, he was able to retrieve their minds from the Undervoid and return them to their transformed bodies. Once their minds were returned, however, they would be a blank slate, waiting to have their minds "programmed" with someone with a strong enough will. Kylo, now going by Tenebris, programmed these new creatures to help him get revenge on Princess Aliona and called them the Wrath. Upon discovering that Aliona had already died, he instead decides to use them to destroy the Drashani Empire.

During Kylo's attack on the Drashini Empire, he discovered that his ability can also be used to create more Igris, which in turn could create more Wrath. He was soon able to turn this ability of his into a weapon that he called the Acheron Pulse, which was capable of turning entire planets of people into igris and bending time itself when it was at full power. (AUDIO: The Acheron Pulse)

When the Sixth Doctor attempted to persuade Tenebris to cease his attack on the Drashani Empire, the Wrath become confused by the contradiction between the two men's wills. This causes them to send both the Doctor and Tenebris to the Undervoid in both body and mind until one of them can prove that their own sense of morality trumps the other's or they come to a compromise. When the Doctor is able to get Tenebris to admit that he only attacked the Drashani Empire because of his anger at Aliona for her betrayal of his love and not because of any anger toward the Empire itself, the Wrath determine that the Doctor's sense of morality is the stronger one. After requesting that he give them new programming, the Doctor reprograms the Wrath to become a force for good by using his own moral code as a template for their future behaviour. However, by the time he returned to this region of space fifty years later, they had taken this new morality to the extreme and were attacking everyone for any perceived sin. (AUDIO: The Acheron Pulse, The Shadow Heart)