In a certain other world, there is an event called the Shape-Changing Battle Death Match
Martial arts, magic, jujutsu, and all kinds of attack methods are allowed as long as they are related to the state change.
This is a stage for those who love shape shifting.
The main feature of this event is to take away the human rights of the opponent who has been KO'd and make him your property.
Even if it is not the case, the prize money is the main attraction for those who are proud of their skills.
On the other hand, there are those who fight for the possession.

https://www.pixiv.net/en/artworks/103250307