Force Shape Shift

 was a Force power that could change the features of others(such as changing their eye color), or even turn them into something that did not have a level of intelligence that was normal for most sentient species(such as a bantha). It could not be used to disguise oneself, although another user of the power could use it on the person who wished to be disguised.

Use of the power required extreme concentration, but it could be used in many ways. It could reportedly turn the populations of entire worlds into animals, as it did in its first test on Bugual III. It could be used as punishment for incompetence by temporarily turning an apprentice into a bug, as Darth Dararus student Akiko discovered. And, according to reports, it could turn inanimate objects into unquestioning servants of the user.

The only known user of this power is Darth Dararus, who invented the power to help him destroy Luke Skywalker. Why he did not use the power during the Duel of the Tokyo Rainbow Bridge is unknown, but Luke reports that Akiko found out how to block Force powers from use, and blocked this power from Dararus.

Behind the scenes
This power is inspired by the movie Spirited Away, from the scene in which Chihiros parents are turned into pigs.