I Don't Have Much Time Left to Save the World

Lin Xiu was reborn and returned to ten years ago, the first year before the disaster struck. He became the only immortal cultivator in the world! And in 30 days, this world will be invaded by thousands of realms! D-level alien world: the conscious invasion of the zombie world! C-level alien world: Invasion of the mutant level from the world of giant beasts! B-level alien world: The Dark World invades from the abyss! A-level alien world: Immortals from the Immortal Martial World invade! S-class alien world:... There is not much time left for Lin Xiu to save the world! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.