The End of the World: If I Don't Have Superpowers, I Will Become an Immortal

[Superpowers + Cultivation of Immortals + Multiple Heroines + Rule-based abilities] Others are developing supernatural powers in the wasteland, while I am secretly cultivating immortality in the last days. At the beginning, there is only a low-level fire control technique for refining weapons? It doesn't matter, if it's not written, the fire you can control is unlimited. Low damage? Silly boy, the sun is considered fire. At the beginning of the collapse of the sky, he descended into the SS-level restricted area of ​​the dead wood forest to save the girl Raven, but was chased by the angry villain? Wait, what did you just mention? ! Sorry, anger is considered fire. "Burn them all with fire!" Protecting a little girl who stuck to him the whole time and only dared to hold his arm, With a timid yet loyal chatty teammate, Plunge into the dead city where puppets are everywhere and the boss is infinitely resurrected. "You command the puppets and I command the flames. You have no idea who will win? Anyone who wants to touch my guard should first ask about my sword. " The next second—— Burning flames burn the city, the sword splits the buildings, and the whole city is cut off with one sword. Raven: "It's a wonderful story, but can you first explain why there are so many girls around you!"