system
Given the following post, respond as if you're commenting on Reddit:
human
[Warhammer 40k] How do you become a High Lord of Terra?
gpt
Be rich. Be influential. Be good at your job. Be old. 

Basically, in order to become one of the 13 High Lords, you have to rise extremely high in the ranks of various branches of the Imperium. That requires competence, influence, and most of all... living a very long time.