Universal Mage: My Fireball Technique Can Be Infinitely Upgraded

The first stage: Level 1-10 - Ordinary fireball. As the level increases, the power gradually increases and the magic power consumption gradually decreases. The second stage: Level 11-20 - Multiple fireballs. As the level increases, the number of fireballs increases, the power gradually increases, and the magic power consumption gradually decreases. The third stage: Level 21-30 - Large Fireball Technique. As the level increases, the size of the fireball gradually increases, its power is greatly enhanced, its number gradually increases, and its magic power consumption gradually decreases. … Level 100 - Great Sun Fireball Technique. When it reaches level 100, it can transform into the great sun. Wherever it passes, the sky will collapse and the earth will split apart, and all things will be destroyed! Etc! We have already reached level 100, but the fireball technique can still be upgraded? Who can bear this! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.