Reborn as a Dungeon Lord: My Monster Army Is Invincible

Sinopsis

Betrayed and killed, Rennes awakens three months before his dungeon is destroyed. With the Invincible Lord System, he summons a Mythical Golden Dragon, recruits powerful outcasts, and turns a ruined lair into an unstoppable fortress. This time, every knight, noble, and prince who comes for him will pay the price.