My Superpowers Can Fuse Without Limits, and I'm Invincible Before the College Entrance Exam

In a world where everyone awakens superpowers, people undergo their awakening when they start high school. The rank of a superpower determines how much potential its owner has, and whether they can become a mighty figure admired by all! Some prodigies awaken ice powers, freezing the world with a single thought and plunging all things into silence! Some awaken summoning powers, commanding skeleton armies and undead calamities to dominate their corner of the world! Others awaken psychic powers, wielding flying swords to slay exotic beasts as easily as chickens and dogs! But Lin Heng, who transmigrated into this world, awakens only a commonplace D-rank fire power. He is doomed to struggle even to pass the martial arts college entrance exam, destined to fade into obscurity. Luckily, his Superpower Download System activates. As long as he gets within a certain distance of someone, he can download their power and use it as his own. He can even fuse and evolve his powers? “Superpower download complete. Obtained B-rank enhancement-type power!” “Superpower fusion complete. D-rank Flame has evolved into A-rank Crimson Heavenly Flame!” “Obtained superpower fusion technique: Breath of Flame!” “Fused with an SSS-rank summoning power. Superpower evolved into the SSS-rank Golden Crow Divine Flame!” “Obtained superpower fusion technique: Summon: Great Sun Golden Crow!” … While everyone else is still congratulating themselves on having S-rank powers, Lin Heng is already brimming with SSS-rank abilities. The Great Sun Golden Crow in his left hand, the Supreme Yin Mystic Ice in his right, and a purple-gold demon dragon beneath his feet. When he looks back, he realizes that somehow, without even noticing... he has become invincible!