After the great battle, Miso was defeated and fell from the heavens to the earth. When he fell, he fell so fast that he was surrounded by flames and damaged the earth when he had landed. That was considered as lightning.
Due to Miso's greed, his family had been captured by Eirini and imprisoned in the heavens.
As the family of Miso cried, it fell to the earth, creating what is now called rain.
Days later, Miso rose from his defeat and told himself that he would not be forgiven until he had gotten revenge on Eirini for the misery that he had caused for Miso.