So far, if there is anyone Klaus had troubled the most since he left Earth, it would be Rory and her father. They had gone through a lot because of his troubles.
So the reason he was forced to gain the six favours was to ensure they were fully compensated before leaving. Initially, he didn't know Burning Angel was an old friend, so he merely wanted a way to keep his life intact in the future.
With six favours, he can call on Burning Angel a lot of times, and he would come.
However, now that he is aware of their relationship, the six favours don't mean much to him. So he decided to be generous and make up for the trouble he had caused the father and daughter.
"For my first favour," Klaus said, turning to look at Lord Victor and Rory before he spoke, "I want you to take in Lord Victor as your disciple for 100,000 years."
"Huh?" Both Lord Victor and Rory widened their eyes.
Obviously, they weren't looking forward to Klaus asking such a favour.
