Questions about Star Guardian Lore

Hello, I was reading the star guardian lore they released yesterday and there's a few things I don't understand and I would love to discuss >_<

• Why did ahri's team come to valoran city if the planet was already being protected by another star guardian team?
• Does star guardians have a limited amount of energy they can spend and after they reach the limit they die? or can they only die in battle?
• Was First Star created by a celestial dragon such as ?
• Does First Star have a limited amount of energy it can use to create new star guardians?
• Is first star an actual star or is it a living being like the other star guardians?

[vlad-salute]