Archmage: God-level Modification System

"Ronaldo transmigrates to a world of sword and magic and becomes a talentless mage apprentice. Others would only need to study for a year to gain basic control of elemental energy and become a mage apprentice. However, even after five years in the magic academy, he remains a mage apprentice who cannot control elemental energy and cast magic.

He believes that his life would end with mediocrity when he suddenly awakens the God-level modification system. Anything that's modified by the God-level modification system can be used by him.

""Congratulations, Host, for activating the modification system. Speed+999999.""

""Comprehending the Hundred Steps of Divine Alacrity, breaking through to beginner… adept… mastery…grandmastery!""
…
""Congratulations, Host, for activating the modification system and successfully modifying the fireball spell into the fire-elemental forbidden spell, Heaven-burning Flames.""

""Congratulations, Host, for activating the modification system and successfully modifying the windblade spell into the wind-elemental forbidden spell, Wind God's Wrath.""

…

With that, a mage that relies on a modification system to cheat is born."