the symbol of Beshaba / "insurance, insurance, insurance...health, life, and death. Are you covered?" a seemingly concerned female voice emanates from this symbol.
the symbol of Loviatar / "Oh, how delightful! A large, large donation is in order. I mean huge!!!" a laughing female voice proclaims to you...from the symbol, if that makes any sense.
The symbol of Talona / "Did you get the recipe...no, then tell me how would you rate the ambience? Most importantly, was it good for you?" boasts the excited female voice projected from the symbol.

I know, probably too wordy, but what fun to be so desperate as to think your life could possibly be of such interest to the gods. And of course each hallucinatory visit would have to depend on the 'cause of the affliction' or, given the propensity for persons not knowing how they are afflicted, would it? Surely, some other gods of the kingdoms could have a morbid/foreboding and hallucinatory (for the victim) reaction to delerium as well.

Or is it a requirement that these things be visual and or vocal - without spoken dialogue?
then, how about...animated meat / decidedly rancid meat is dancing a jig
...the voices of many / a thousand-thousand prayers of supplication to (any goddess listed above) assault you, or
...syntax< you see: the smell of Dwarven song, or
...syntax< you see: the first conscious thought of an golem's grandchild.
... " < you see: your concepti.... on second thought, there's no point in making the game that ugly.