Welcome to the impregnable castle of the Demon King : Black Mage, who was kicked out of the heroic party for not needing debuffs, is welcomed by the highest ranking officer of the Demon King's army 4

The invincible heroic party vs. the strongest demon king's army finally clashes: !!!! In an age when dungeon crawling has become a pastime.... The Fenix party's unprecedented attack on the tenth layer of the Demon King's Castle begins. The [Black Mage] Leme, who serves as the chief strategist of the castle, and his new friends are determined to fight back against the party that drove him out.... The heroic party led by the out-of-this-world [Hero] Fenix and the elite of the Demon King's Army led by the strongest [Black Mage], two mighty forces, violently scatter sparks in this fourth volume!

The invincible heroic party vs. the strongest demon king's army finally clashes: !!!! In an age when dungeon crawling has become a pastime.... The Fenix party's unprecedented attack on the tenth layer of the Demon King's Castle begins. The [Black Mage] Leme, who serves as the chief strategist of the castle, and his new friends are determined to fight back against the party that drove him out.... The heroic party led by the out-of-this-world [Hero] Fenix and the elite of the Demon King's Army led by the strongest [Black Mage], two mighty forces, violently scatter sparks in this fourth volume!