there is no such thing as a phantom nightmare. you can't just make up random phrases and expect them to be translated to japanese.
Yuurei.
Akumu.
'Ningyou Akumu Shiryo
bad dreams warui yume nightmare akumu
Akumu is nightmare. The Kanji for it is 悪夢
You may say 'yuurei,' written: 幽霊
最低の悪夢 now all done
You may say 'yuurei,' written: 幽霊
"Watashi wa Akumu desu". But it wouldn't make sense to a Japanese speaking person... I guess we don't express things that way..
悪夢 (akumu)
悪夢 (akumu)
幻影.