Global Power: I, the Necromancer, Am the Natural Disaster

[Global superpower + god-level system + school beauty + invincibility + killing decision] Blue Star, ferocious beasts are raging, superpowers are awakened, everyone has the possibility to stand on top of the world! Lin Yi, who came from time travel, only awakened the F-level supernatural skeleton summoning ability, but fortunately the super enhancement system appeared! What are you? A-level supernatural healing technique? S-level superpower Nine Heavens Divine Thunder? Sorry, I, Lin Yi, am the protagonist! Look at my SSSSS... Level powers!