The Boss of the Apocalypse Just Wants to Ascend

No CP, no CP, I forgot to select the label (Apocalypse + natural disaster + extreme heat + extreme cold + max level boss + decisive killing) Nan Jin, the leader of the world of immortality who has overcome the tribulations of the Great Perfection, was about to ascend after surviving the ninety-nine thunder tribulations, but was dragged into the space-time rift by an extremely powerful force. She narrowly escaped death and fell into a swarm of zombies, but she, who was so powerful in overcoming tribulations, turned into a weakling at the first level of Qi refining! The end of the world, right? Zombies, right? Are you messing with me like this? It doesn't matter that she has never seen anything that is so powerful in cultivating immortals. When her strength is restored, the world will be destroyed! However, the slap in the face came as a surprise. She has spiritual stones, but she can't use them. She has spiritual veins, but she can't use them. Only the crystal nuclei in the zombies' brains can absorb them. In order to regain her strength, Nan Jin began to work hard at killing zombies and digging for crystal cores. She dug and dug until finally all the zombies were destroyed by her! Ps: The heroine is a cultivator, she is super strong, she is at full level when she appears, her combat power is at the ceiling, no matter who it is, if they mess with the heroine, they will either die or die!