There is a beautiful article, if you have children, you can become a big bird when you attack, and then when you are born, your wings hold the pearl of fate.

Idolize Guide to Love+Intimacy Guide to Violence+Dragon Training Guide to Kings Author: peerless cat rascal.

A series of three articles are set in this way. It attacked the bat rainbow dragon (with wings), and the bat rainbow dragon laid eggs. When a cub is born, it has a destiny stone in its wing, which glows when it is close to its destiny partner.