noun, noun or participle which takes 'suru'
protean and elusive; appearing and disappearing like a phantom
Describes something that changes form unpredictably and vanishes, often used for mysterious or supernatural entities. Can be used as a noun or with する.
その忍者は変幻出没して敵を翻弄した。
The ninja appeared and disappeared like a phantom, baffling the enemy.
変幻出没
I heard a story about a ghost that appears and disappears mysteriously.