前世が最強魔導師だった俺、異世界魔法で無双する!

The world changed completely after Dungeons appeared. Only "Subduers" who possess Cheat abilities called "Ideas" could defeat Monsters, and they monopolized wealth and fame. The protagonist, Amato Sakurazaka, living in poverty, suddenly awakens to the memories of his previous life. Making full use of the "Magic" he once mastered, he ends up living as a "Subduer," but...!?