Time travel and become a down-and-out noble, the castle is leaking, rats are running around in the granary, and the serfs are preparing to pack up and run away.
Someone else would just lie down and die.
Roger smiled: There is a saltpeter mine in the back mountain. Do you call this a desperate situation?
Make salt with local methods and get your first pot of gold.
Improve the crossbow and arrows, defeat the bandits and make a lot of money.
When the bishop wanted to burn this "heretic" to death, Roger took out his telescope:
"Are you sure you want to argue with someone who understands science about whether the earth is round?"
Just when he thought he was the only traveler, a mysterious monk visited late at night:
"Young man, who drew the star map on your wall?"
——The secrets of this continent seem to have been awakened in advance.