As another power now entered the fray, Elfled smiled pure maliciousness, taking one step back from the creature before her. Something had gone wrong in hell... Something had gone very wrong.
Daddy was angry.
"Thou shalt not stand in hell's way...!"
Commandments. It stood to reason that darkness, especially in the guise of something so dependent upon strictly regimented order, would have its own. Quite whether a literal interpretation of such or a more poetic phrasing, Elfleda practically hissed out those words with all the venom of a rotting viper. She did not want to serve a mere successor. She wished the thing to be vanquished, like any other inconvenience.
There was no pity. Only sheer, sadistic glee, as she saw 'justice' done, down here. Now Atia would feel as she had. Perhaps even worse. Only time would tell and it was a quality of which there was much in the realms of eternity.
In the aftermath of Atia's dispersal, a simmering black mist arose from the very surface upon which Elfleda stood. Something interacting with and returning her to that same dark purple glow of before, when she had been wielded in a Slayer's hand. Royalty. Emissary of the Black Light. Corruptress... Even without words announced, it was evident what was happening and the strange sound of hallowed chanting and deathly bells could now be heard around her. Somewhere, in the gloom, could be made out the ghostly figures of an entourage. One which had been denied, now to circle around in protective formation. Ready, once more, to do their Mistress' bidding.
And now she turned to Rhiannon.
"A bargain well met, Slayer... Leviathan thinks well of our ruse."
Somewhere against the background of distant screams could be heard a rumbling thundercrack and Elfleda gazed towards it, seemingly in communication. Black eyes returned to Rhiannon's prone form and corruptress gauged her anew.