After Xu Yan suddenly went dead one day, he was bound to the system.
"After accumulating a certain amount of energy in each world, you can jump to the next world. When the total amount reaches a certain amount, you can return to life."
"How much does it take to go back?"
"Unknown."
"Ah?! Aren't you deceiving me?!"
"It has nothing to do with the mission. I refuse to answer."
My writing is rubbish! I procrastinate! Thanks for watching!
Concept: How to write this thing