The quality of being phantasmal.

Something seen but having no physical reality; a phantom or apparition. / (philosophy) A impression as received by the senses, especially an image, often prior to any interpretation by the intellect.

Of or pertaining to ghosts or phantoms. / Eerie or frightening. / Expresses qualities of or produced from fantasy.

plural of phantasm

Like a phantasm; ghostly, unreal.

In a phantasmic way.

In a phantasmal manner.

Alternative form of phantasmic