6 decades books

Bastill is kidnapped and sacrificed. Turned into a dungeon by his captor, furthermore they plan to return in five years to collect the matured dungeon core. While his stats are reverted back to the first level, will he be able to overcome his enemy? With experiences from his human life, watch as Bastille builds his dungeon into a fortress, amass an army, and level up. Will he protect his core when the time comes?