This would be absolutely perfect. Especially for

Nightmare seems too malicious, but he's not supposed to be overtly cheerful either.

Also, rift just looks badass. I hope we get some during this year's masquerade.

I think eldritch horror doesn't automatically mean in agony. They can be otherworldly and detached. But the dark matter color might be too close to the idea of a rift color as a concept for staff to do anything. But i can dream.

yep. Agreed.