Where did the rings of life/void come from what is the extent of their powers?

It’s unknown what the extent of their power is. Their very nature is mysterious in the same way though- They’re implied, in Canon, to come from a Void Session, which implies they are the White and Black Queen’s Rings from the Alpha Kids’ Session. This is further implied by the fact Roxy and DD become invisible when wearing the Black Queen’s Ring, but, Caliborn implies a closer connection to the Void, and we know the Queen’s Ring can cast the Red Miles, so it’s hard to tell if it can STILL do that, if it’s just like. Stuff the Ring can do naturally, or if it’s specific to THAT ring, or if something happens to it afterwards that makes it into a Juju.

The Life Ring is even weirder, we know it can bring a character back to life- But it is not something the Kids got from the White Queen or anything like that. You know the furthest back traceable origin of the Ring of Life? Fucking Hussie. HUSSIE himself gave it to Vriska, and then Tavros got it, then John got it. There’s also the implication that they may actually be the same One Ring, rather than two separate ones, since ‘losing one’ is usually linked to ‘finding the other’. The fact in the end the Caliborn that becomes Lord English is wearing the Ring of Void, and Calliope is wearing the Ring of Life, only reinforces the idea of duality, yet one and the same, though.

And honestly, we cannot tell much more from them. It’s one of the biggest mysteries of the comic right now, and they’re not helped at all by the fact that they are… Well. Jujus. They’re authorial McGuffins. They appear and disappear and have extremely powerful and arbitrary powers in-canon. There’s no trace-able origin in the story itself. Because there’s really not much of an origin. They’re Plot Points- The Vessel of the Villain, spanning the entire story. The Manifestation of the Plot itself with the Kids trapped within which they must escape in order to get away from English. The Clock that showcases who lives and who dies. The Ring able to bring back any character from the realm of the dead. A Cheat Code that makes everyone hyper creepy happy alluded to be an Easter Egg in the game that is SBURB. It’s like. They’re not physical, sensical things. There’s a layer of Meta over every Juju.