追放されたFランク~墓の主となり復讐する~

Trapped in the Dahuang Ancient Tomb instance with his adopted son and ex-fiancée, this man is judged an F-rank weakling and abandoned. At death’s door, he awakens the Tomb Master system, bonds a six-wing salamander, disables traps, and tames beasts. He kills the shaman and claims the tomb, but what will its power demand next?