100 Days to Seduce the Devil - Chapter 86 Nathan’s Choice

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

When a satellite photo of the Arctic was sent back to the countries, the people of the earth were shocked by the content of the photo.They saw thousands of wolves in the Arctic, which even included hundreds of polar bears and Arctic silver foxes, all uniformly looking obedient.On the top of the snowy mountain, a giant Arctic wolf, whose size exceeded everyone's imagination, was looking down on the Arctic ice field from a high position.

There was a Senior Brother and a Junior Sister. One of them was transmigrated to this world and had cheats while the other was the reincarnation of a Great Emperor.