oooh what do you think of voldemort/severus/sirius? >:)
Ngh, you know that I love Snapemort, they are my two ambitious, traumatised, dramatic, muggle-raised halfbloods with a tendency to push the boundaries of Magic. But one of the things Severus lacks to be able to bond with Voldy is sadism, which is where Sirius might step in (like he's no Dark Lord, but Voldemort himself has a rather limited direct kill count in the books; they both find physical cruelty amusing, tho).
We know that Sirius is deeply loyal, and in canon, he's loyal to James, but could he be loyal to Voldemort instead? Maybe something goes wrong in the very beginning, before Hogwarts, like Walburga dying when giving birth to Regulus, and Sirius therefore being raised differently. Maybe something happens to James, like he dies (the best plot device is death lol, especially if James Potter is a victim), and Sirius gets disappointed in the Order and in Dumbledore. Maybe Sirius gets invested into why is Regulus acting so suspicious lately, and suddenly finds himself in the DE lore balls deep. Maybe Sirius keeps being obsessed with Snape after the graduation like a little freak and follows him once, only to witness something he shouldn't (Sev's DE shenanigans or Snapemort making out, you choose).
Now I also think it'd work very differently depending on if it's Snirius to Sniriusmort or Snapemort to Sniriusmort. Maybe it's just Sirius loving Severus so much that he follows him to DEs, and Severus wants to join because he has a secret crush on Voldemort (Regulus infected him. or maybe them both). I hardly see it being Sirimort initially lol unless we really Bellatrix-fy Sirius.
But in the end, this would be absolutely unstoppable. Even worse than Snellamort, because Sirius and Severus will not make out just to compete for Voldy's attention, they'd be totally obsessed with each other, too. There are also angst possibilities with Prophesy still being a thing and Jily being respectively important to Snirius, so Sev asks Riddle for Lily, while Sirius asks him for James, and from that you can build A LOT of scenarios too! Do Snirius unite against Voldemort while still loving him? Do they quarrel instead? Do they go to Albus, or choose to trust Voldy, or decide to give no fucks about Jily? Maybe Voldemort kills jily because he's jealous his lovers value those morons so much, but spares Harry and decides it's safer to raise him instead of killing him, so that the poor boy ends up parented by those disasters?
They also can be soooo funny, like Sirius with his upfront personality who actually knows all the Magical culture and stuff better than Voldemort and makes him a bit self-conscious, while Voldy slips something Muggle coded once and Sirius who used Muggle culture as a form of teenage protest loses his shit, and Severus has no idea what is their problem. Sev and Voldemort really are into experimenting with Magic and Potions, and Voldy even teaches Severus to fly, Sirius being totally jealous and telling them his bike is 100 times better and actually comfortable unlike hanging in the air by yourself like a stupid bat, and this little hypocrit keeps bitching about the Magic being Dark too. Snirius are abnormal, with Sirius trying to piss Severus off to get his attention and squeeze a reaction out of him, Severus' nervous system physically hurting because of that moron, and Voldy finding Sirius' unhinged behaviour and Severus' biting retorts way too sexy. And pretty annoying too.
