Versatile Mage: I Became a Mage in Full-time Magister

What? You say you have the forbidden Geo spell 'Mantle Shift'? Sorry, I have the forbidden Geo spell 'Heavenly Obstruction Starfall'. What? You say you have the invincible Fire-type Heavenly Seed? Sorry, I have the Supreme Flame Emperor of All Fires. This is a story about someone who, through a system, draws upon skills from countless worlds and, in the world of Full-Time Mage, punches the Black Vatican and kicks demon emperors. Years later, the world reveres him as the "God of All Laws" or "God of Magic". ———————— This book is also known as "I Became an Armored Warrior to Become the God of Magic", "I Became Ultraman to Fight Monsters in Full-Time Mage", "My Background is Actually a God of All Realms", and "I Impersonated a Summoner with Scrolls".