Mingyi was worried for Lanying. She was a capable exorcist, but handling a powerful enemy alone was still dangerous. As he brought Ciara to rejoin the fight, he heaved a sigh of relief knowing the exorcist was alright. The fairy woman then blurted out a very indecent remark, but it managed to distract the incubus enough that he stopped focusing on his spell. And that was just the opening Lanying had been waiting for. Swapping out her instrument, the shrill screech of the erhu pierced the air as she began to pull the bow back and forth in a frenzy. Taking in a deep breath, she shouted lyrics at the top of her lungs as the magical stringed instrument cast rippling shock waves of light and sound. "ON A COLD WINTER MORNING, IN THE TIME BEFORE THE LIIIIGHT–IN THE FLAMES OF DEATH'S ETERNAL REIGN WE RIDE TOWARDS THE NIIIIGHT~"
All the while the exorcist was screaming and dodging using magic, Ciara brought the pedestal to Mingyi's attention. Her instructions were clear, and he gave her a short bow in thanks before breaking into a sprint. If there was one thing Lanying was good at, it was being as eye-catching and loud as possible. Not only did her 'singing' and music hurt the ears, they were actually imbued with damaging power too. She needed more time to cast the final spell that would send this foul fiend packing, but right now she needed to keep chipping away at him. Mingyi reached the pedestal and grabbed a handful of the purified salt, throwing it onto the barrier protecting the contract scroll. When a single handful wasn't enough, he simply upended the entire contents remaining in the sack, showering it with a rain of coarse grains. The sheer quantity finally wore the barrier thin, and being a supernatural being himself he was able to force his way in to snatch the scroll up.
Immediately he started to rip it up, shredding it as much as possible. He then shoved the pieces into the salt mound on the floor, for good measure. There was a faint sizzle as the purifying properties of the salt actually did their work. Lanying was now holding her lute again, and she pointed at the demon in an act of showmanship. "And now, for the final act of this farewell concert–'Over the River of Three Crossings'!" Her fingers began to fly up and down the instrument's strings in a way that didn't seem humanly possible. If she had been an ordinary human, her fingertips would've been shredded by now. In an intimidating lute solo, she poured her heart and soul into it–her spiritual power rising in a crescendo.
"The Black Tortoise guards the North, the Azure Dragon rules the East! The Phoenix flies over the South, the Tiger faces West! By the Mountains and the Seas, I pray to the Heavens once! By the Skies and the Land, I worship the Earth twice! By the stars above and the abyss below; I ring the bell thrice–Evil, Begone!"
A powerful blast of light erupted from the chamber as a great seal began to shimmer beneath the demon's feet. Lines began to connect and symbols were made manifest as an overwhelming force was exerting itself on the incubus, shunting him out of the mortal plane. As the contract was now null and void, the magic that granted passage into this world was no longer in effect. Raising her arm up high, Lanying swung it down letting out an ear-splitting blast of sound. "OH YEAHHH!!!!"