' False face fern- ultra rare
This beast uses light and water energy to be able to mimic the appearances of others over the top of their tamer. Because of this, they are known to be the beasts of royalty and thieves at the same time.
Tjye have long been raised by royalty so that they can leave their guards in safety. This is best used for diplomatic missions. But thieves also raise them to hide themselves after committing various crimes. There was even an elven serial killer that made the false face fern illegal in an entire elven city for fifty years after he was caught.
The potential for growth comes in the control of light and water energies. Because of this, the false face fern gives up on the ability to grow in to new forms. It will just be able to better replicate details the more powerful it gets.