"The structure diagram they bought for a lot of money decades ago, can only be used once every few decades. If you conquer it yourself and pass a C+ class or above for a few years, you will come to sell it... If you are a C-class, you can use it for 10 years after capture, but C-class adventurers don't need a structure drawing. Instead, I think it would be better to take a detour to kill a lot of monsters and look for a watering hole. If you are C+ or above, you will become an adventurer who is looking for spirit orbs, so some adventurers want to reach dungeon bosses without draining their stamina. We've seen a lot of former adventurers in the Mars Guild who are said to be trustworthy, but that doesn't make us want to buy them."
Nami answered with a sigh. It was expensive...
"Is that so... I was lucky to be able to copy Karne's structural diagram..."
"What? Do you know Karne?"
Suzhu rolled her eyes in surprise.
"Ah... The S-class adventurer Carne is my sword master."