Reborn at the End of the World: A Showdown

In the apocalypse, the heroine and her rival face off for a third time in a climactic battle after being reborn.

Want to cheat your way to victory? Then come and take it.

This story includes rebirth, the apocalypse, cultivating immortality, a portable space, the heroine's revenge, and a golden finger.

A practice piece, please don't flame me =-=