You may see phantasmagorical used when people talk about visual and audio effects, for instance, in theater, movies, and music. Sometimes it crops up in literary and political discussions.

With the sense of “illusory” or “unreal”:

"My feeling is that white Christian fundamentalism is not about practicing Christianity, it is instead a system that distributes phantasmagorical micro-powers to those who cannot face the real causes of their powerlessness." – @mudede https://t.co/ZWkPWJ7Xb5

— Lindsay Brown (@ounodesign) September 10, 2019

Suggesting something “confusing” or “disconcerting” in its effect:

Trey Edward Shults' WAVES (***) portrays victims & survivors of toxic masculinity thru phantasmagorical camerawork, shifting aspect ratios, and an upfront Trent Reznor/Atticus Ross soundtrack. Powerful performances carry the zigzag narrative to the finish line. #TIFF19 #TIFF2019

— What if…? (@DelfTerry) September 11, 2019

Phantasmagorical as “dream-like”:

Here’s another song I wrote over the summer… This one’s called “Cold Water” and I was going for some dreamier more phantasmagorical qualities, lemme know what you think!

P.S. pals, I’m gonna throw down a Dylan… https://t.co/x695rvZt12

— Calista Garcia (@calista_music) September 12, 2019

Did you mean phantasmagoric?