[h3]Hidden alcove, outside the walls south of Yahar'gul, northwest of Yharnam[/h3]
While Gerlinde casually leaned on the staked-down lightbeast and twirled her fiery cane, and Torquil collapsed his axe back into its shorter form and successfully retrieved the Loch Shield, the darkbeast remained focused entirely on the Shopkeeper.

The darkbeast swiped again, but the Shopkeeper took a swift and carefully measured back so that its claw missed them by a hair's breadth, only for the Shopkeeper to immediately step back in while spinning the Burial Blade over their head. The great scythe came down vertically on top of the darkbeast's skull, piercing deep into it. It was a wound that one would assume to be lethal to any ordinary creature... but Farren especially had already witnessed a Hunter survive something similar when he had plunged his Blade of Mercy into Skinner's forehead.
Indeed, the darkbeast wasted no time retaliating with another red-glowing explosive slam of its claw. This time the Shopkeeper did not have time to conjure an Effigial Loch Shield to protect themselves, so even as the silt was blown into the air in another dust cloud, they were thrown backward and out of the obscured area by the force, where they ended up rolling an extra meter or so, now unarmed. The darkbeast followed with a fierce snarl, pouncing on the caretaker of the Dream with both claws extended, but again the Shopkeeper managed to roll out of the way in the last moment and get back on their feet.
Raising both hands over their head, the Shopkeeper summoned another weapon with a blue flash: something that looked like a pair of simple, a large wooden wheels connected by an axle, only with the rims of emanating an ominous dark-red arcane aura in the form of what appeared to be human skulls. They slammed the Logarius' Wheel down into the darkbeast's head as it advanced once again, and the wheels appeared to spin violently on their own, carving into the monster while radiating dark, baleful spirits.
Instead of trying to evade or defend itself in any way, the darkbeast repeated the maneuver it had just failed at and brought both of its hands up behind the Shopkeeper, dug its claws into their back, and pulled them in close to its face. The Shopkeeper allowed their wheel to vanish, only to immediately summon a beast claw and use its power to partially transform into a beast themselves, after which they started viciously clawing at both sides of the darkbeast's head at the same time.
Meanwhile the darkbeast seemed to just stand still, just allowing itself to be shredded... except that while its body held still, its lightning was moving. The red glow wreathing its form migrated toward its front, leaving first its hind body dark, then the rest of its torso, until all of its light seemed to focus into its hands and head, each of which now gave off a blindingly bright glare.

There was a powerful sound so deep that none of them could hear it, but everyone felt it rattle their very bones, just as they could plainly see the shockwave sending an obvious ripple through the silt across the entire alcove. Though the light was concentrated entirely on the Shopkeeper, anyone within twenty meters of them would easily be able to feel the heat wafting past them, as if someone had just opened a pressurized furnace.
Then the darkbeast collapsed limply where it was, black smoke rising from its claws and head, and all its electricity gone. The Shopkeeper was also gone, however, and in the place they had stood but a moment ago the ground had turned to glass.