Draw the Great Tomb of Nazarik at the Beginning

Traveling through the magical world, I gained a system for cultivating immortals! The lottery ticket actually won "The Great Tomb of Nazarik!" A huge tomb with a depth of 10 floors! Each floor is inhabited by level 100 guardians and huge monsters! Become the king of an underground force without being a good person at the beginning! Summon an army of undead! Fight for hegemony in this vast alien world! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.