Jin was standing in front of a screen during the earthquake. On the screen, the options were "easy," "normal," "difficult," and "impossible." Jin chose "impossible" and the screen turned off.
After a while, the earthquake ended and the place changed and Jin opened the mission screen. The mission was to stay as long as you can and kill as many monsters as you can. Jin pressed start, pulled out his sword and started attacking.
In the first place, there were skeleton soldiers. Jin killed them all with a single sword swing. After 50 minutes, the goblins arrived and they too were easily killed. After 50 hours, the orcs arrived and were again easily killed.
Trolls and dervishes were killed in the same way. However, the dark elves were a little faster and more difficult. While killing them, Jin gained skill points and gave them to strength and agility. In this way, he had a bit more trouble with the dark elves, but eventually killed them as well.
A week later, armored soldiers arrived. Their armor was very thick and Jin used mana to cut it. After half an hour, he ran out of mana and got very tired. At that time, the very powerful demon race arrived.
After a difficult battle that lasted 5 minutes, Jin could barely hold on and the number of demons suddenly grew. Jin pressed the system button as they all came at him and decided to finish the exam.
His profession was determined as "Shadow Swordsman", and his ability was to make shadow copies and his passive abilities included shadow slash.
Jin left the dungeon and the quest screen opened. The quest was that if you defeated the shadow lord, your profession would be upgraded to "Shadow Lord" and the shadow lord's sword would be given as a reward.
Jin set out and his goal was to defeat the shadow lord and advance his profession.