Harlot's Lair

In your journey across Sornieth - now in Light's domain - you spot an odd structure of color-changing glass and sharp rock. Upon closer inspection, the glass becomes hard to look at for too long, seeming to almost disappear and "glitch" in your sight, as if meant to deter you from looking. You manage to steel yourself through the wave of dizziness and unease, enough that a cave entrance is revealed to you. You enter, mind feeling fuzzy.