Realm of Lightning

Ever since Kane had seen Rui's elemental domains in the Mellow Manifold, he couldn't help but wonder whether or not it was possible for him to create such a domain himself.

Specifically, an elemental domain of lightning.

After all, he had always wished he could retain the power he had in the Thundering Valley. That place… that environment, he was the strongest he could ever be when he was there.

Of course, much to his dismay he had needed to leave the valley, for he couldn't possibly live there forever even if he wanted to.

Yet, he had never forgotten how overwhelmingly powerful he had felt within the Thundering Valley.

That was the closest he had ever come to defeating Rui in a battle.

He yearned to be able to achieve such immense power at will.

And when he saw Rui developing the Muspelheim and Niflheim domains successfully, he realized that it was indeed possible.

Upon return from the Beast Domain, he began working on two things.