Dr. Caitlin Snow/Killer Frost (Arrowverse)

A relative new world of justice and doom in this multiverse. Of Arrows and Flashes, of Legends and Supers. So many of them could gain the power of the cosmic beings. Yet one of them interested the beings at the moment. However, connected to this world of many sister worlds. One also containing one of version of this potential player.

In one world... she was a villain, cold of emotions and caring for herself as well as only a few other people. Most of them dead. In the main world... she was a hero troubled with a darkside. One she had come to accept, and even welcome as she made a deal with it after it gained a personality. These two interested them. The question was which one to given the power?

The villain to see how deep she could go once given great power? The heroine to see if she could be corrupted? Both to see what occurs when two version of Doctor Caitlin Snow, aka Killer Frost are given that power? To see when two beings with the power could end up doing battle with each other.

Time and space was not limit to them as they decided to...