Nightmare

Nightmare is one of the elemental essence in the Galaxy Kingdom, formerly possessed by Korean. Basically, the user can create, shape, enter and manipulate the nightmares of oneself and others, including modifying, suppressing, fabricating, influencing, manifesting, sensing, observing nightmares and turning dreams into nightmares. Opposite of Dream. It is associated with the color dark purple.

User's Abilities

 * Oneirokinesis/Efialtiskinesis - Users can create, shape, enter and manipulate the dreams of oneself and others, including modifying, suppressing, fabricating, influencing, manifesting, sensing, and observing dreams as well as nightmares, daydreams, etc., possibly including past ones. They can produce and modify dreams, bestow nightmares or lucid dreaming, entrap people in REM, and promote spiritual/emotional healing within dreams.
 * Nigh-omnipotence - The user is virtually omnipotent (with unlimited in power unless the darkest master takes it away; Trigon).
 * Nightmare Beam Emission - The user can release dark magical energy over a specific target causing great damage or delivering great shock waves of force. Some of the sources of purple energy can have greater offensive attacks than Dark Magic itself.
 * Nightmare Ball Projection - As seen, the user can use a sphere of purple destructive temperal energy, like how Korean demonstrated in "Vicious Potential".
 * Nightmare Energy Blast - The user can release dark magical energy over a specific target causing great damage or delivering great shock waves of force.
 * Dark Elemental Manipulation - Allows the user to manipulate all the elements/powers/abilities into a strong darker version.
 * Portal/Realm Creation - This was seen when Korean chanted a foreign incantation to open a portal to the Nightmare Realm, allowing her to cut her hand with the others and plant her blood to let Trigon enter their world.
 * Teleportation - This allows to the user to teleport from place to place (by opening portals or disappearing instantly).
 * Transmogrification - Allows the user to alter the appearance of objects, as seen when Korean uses her new purple energy power of nightmares to act towards the furnatire, turning them into poisonious zombies.
 * Necromancy - This allows the user to communicate to the dead (to bring someone back to life; or to pritict the future).
 * Demonization - The user can turn living beings into demons/monsters.

Trivia

 * Nightmare is slightly less stronger than Horror.
 * As told by Izon, a person who possess the power of Nightmare is mainly born as a dark desecnd with evil running through their blood. Which meant that whoever possess the element would automatically be virtually an evil demon.