Brown Glyph
I remember what you named Infectious Fright in beta. This isn't THAT immature BUT I think the concept would be cool since you're playing with different rift ideas.
For a brown rift it spawns near you at the start of a trial and despawns after a minute. What does it do? It makes you scream endlessly while interacting with a totem or generator, pallet drop or vault and every ~20 seconds it makes you emit a scream sound bubble. (Calm Spirit?)
So the entire trial you're screaming your head off due to...infectious fright due to the brown rift. If you want to be doubly evil you have to escape the trial to complete the challenge.
It's cheeky but it's not too different from facing a doctor and it made me laugh so I thought I would share the idea.