Joker/Yume Yume no Mi

Power
The Yume Yume no Mi can be used to create illusions of ones nightmare. If not the opponent/victim will fall asleep and dream a moment in their life and have it turned horribley wrong and reapeted over and over and over. Until a demon nicknamed Oniki from the underworld will take life of the victim.

Weaknesses
The user suffers from standard Devil Fruit weaknesses and When a man, or women over comes their nightmare the user coughs up a lot of blood. Also the user is unable to sleep.

Attacks
(Names created Purposley no rude comments please)
 * Yume Yume no Your Book of Your Blood By Me: a book that lists a persons nightmares is create from the taken man's/women's blood (usualy a drop would do).
 * Yume Yume no Were Youe I Lived This Before: the opponent realives one of there most rememberable moments and it turns out horribly wrong.
 * Yume Yume no I've Become Your Worst Nightmare Fear Me: the user becomes the opponents worst nightmare or the thing the person fears the most along with its abilities.
 * Yume Yume no Think Of Every Scary Thing Ever And Its Me: the user becomes a hybrid of everything the opponent finds scary.

Trivia
Oniki is a fusion of the japanese words Oni (demon) and Aniki (big brother).