Harvesting a big profit on his trip to the mine, Sol felt a bit better, he believe that he would gain a great deal of strength if he uses the crystal in the right way.
If he could get to be a Minor Demigod before he went to the underworld, then his chance of survival would be way greater than if he went as a lesser demigod.
Even though the average level of creature there was higher than the mortal realm, a lesser demigod was still the norm, if he had become a minor demigod then he will be able to beat the majority of creatures there.
Before he went back to the mountain, Sol visited the teleportation gate site, there were five gates there, one to the neighboring city that he had visited, and the four others were a gate to other cities.
Sol did not know the detail but those cities were a friendly city to his city before the pantheon of red smelter forbids anyone from passing the gate.