Muse is both a common term for a handheld Cognet linking device, and also a specific brand of said CogLink device. Functionally the Cosmic Era version of a smartphone
Last night, your buddy was thinking about calling one of those crazy psychic hotlines, he was really depressed, his girlfriend dumped him, and he wanted some good news. You know they’re all a scam, they give you some advice that could apply to everyone and a large bill to boot. You told him to go for it.
But now he’s missing. All you have is his cell phone, and something is wrong with it. You found it in your toilet today. Yeah, your toilet. It’s got all his old numbers and a few you don’t recognize. You tried to call some, but all you got was a what sounded like a bunch of voices muttering at once. What the hell is going on here?
On some of the islands off the coast, the rites of the local fertility god revolve around ceremonial death and rebirth. The religion's priests have overcome this cycle, however: Each of them is actually undead, ceremonially slain and "reborn"! Their religion is otherwise unremarkable, being an odd offshoot of the mainland's religions. The priests vow to resist their undead cravings, seeing these as the "cycle of life" attempting to reclaim their spirits.