Yume

The Demon Eyeball Yume (yoo-meh) is the legendary artifact of Jupiter Komaede, who was chosen as its rightful owner after the death of its previous owner, Morpheus.

=Appearance= Yume appears as a normal eyeball, except when activated. When activated, the eye turns into a black-and-white spiral originating from the center of the eye.

=Powers= The user can read the minds of anyone nearby, though the target needs to be specified.
 * Mind Reading

The user can speak to a certain target in their mind.
 * Inside Voice

The user can force a certain target to have a nightmare of their choosing. This can include the user entering the mind and showing the user images.
 * Forced Nightmare