Temporarily Strengthened, I Can Save the World

In this world dominated by extraordinary beings, Finn, as a warlock, was given a system that could temporarily strengthen his skills. As long as you kill enemies and complete tasks, you can get recharge. Consume the charge to temporarily upgrade the spells you cast from the first level to the second level, and from the second level to the third level... Fireball? Pyroblast! Summon the water element? Summon the Tide Lord! Along the way, Finn has overcome greater and greater challenges and climbed higher and higher levels. Before he knew it, he had become one of the top experts in the world. Later, demons invaded, the dragons revived, the old gods awakened, the mortal world was in danger, and all the strong men were retreating. Only Fein, with the power to break through the upper limit of the extraordinary system, went around putting out fires. "Give me the kill and I'll get the charge." "With recharge and temporary strengthening, I can save the world!"