She can manage to stab the arm, but it doesn't slow the arm down much; it slides up the sword to reach for her--

--Jingyi yelps in protest as his outer robe is wrenched from him and thrown over the arm. The whole thing erupts in spiritual flames. 

Sword: stabbed through something wooden, and she jumps back, letting go of her sword, pulling out her long knife, and continuing to sing.

The overrobe slowed the arm down even more than the song did. The other juniors started taking theirs off and throwing them at it. 

She follows suit, still singing.

The arm is significantly slowed down by all the robes but it manages to fight its way out of them. 

Before it can get past the juniors and their swords, however, the fierce corpses of the dead Mo family shove their way past and start engaging it. 

She wants the juniors to take this time to regroup - make sure all the Mo household are cleared out, anyone injured fall back - 

She gets out an actual instrument to try to keep the arm calmed - might calm the corpses, too, which could be good or bad - 

If she tries she can aim the music mostly at the arm. It's a lot more than zero effective, and between her and the corpses they can keep the arm from getting out and getting anyone else until--

Her music is joined and supported by the familiar chords of a guqin as the backup the signal flare summoned arrives. All four dead things freeze in place. 

Oh thank fuck.

She had been aiming at the arm, and keeps playing, the mournful tune of her xun well sorted to this sort of thing. Also though she would like to gesture for the other juniors to Leave, Please, as she backs up herself.

The other juniors are more than happy to GTFO. They'll go look after the shellshocked surviving servants or something. 

Now that her father's here she's feeling slightly less like this is the Worst Disaster Ever.

Still pretty bad.

She backs up a good bit, but keeps playing.

He doesn't manage to exorcise the arm, but he can bind it and stuff it in a qiankun pouch to transport back to Cloud Recesses and kill the fierce corpses. 

"Are you alright?" he asks when the immediate danger is past.

"Yeah. Only a bit shaken."

"What happened?"

She explains, pretty thoroughly.

He nods. 

He considers the previously-fierce corpses. 

"Where is Mo Xuanyu?"

"...Dunno. Lost track of him."

"Mn." There were clearly more important concerns. 

He sets the juniors to looking for him. Nothing turns up. 

"A bit odd..."

"Hn." 

Mo Xuanyu aside, he has to take the arm back to Cloud Recesses. The juniors turn in reports on the hunt and discuss what went wrong and right with their teachers. 

There's a soul-eater of some kind on Dafan Mountain, apparently. Wangji's going to check it out, does Fengli want to come and bring Jingyi?

She discusses what went wrong with her father; she has a rather extensive list, including points where she could've done better, and ideas for how.

Yes, she'd like to come with. It'll be fun to do something with Jingyi, too.

It turns out quite a lot of cultivators have turned up to hunt the soul-eater; apparently it's fairly high-profile and the people who mostly care about that have come flocking. Some idiot put up deity-binding nets that have captured nothing they're supposed to and more than a few low-level cultivators. Wangji destroys them all with the sword glare from Bichen. 

Oh look, here's Mo Xuanyu. With the idiot who put up the nets. Who is, apparently, Jiang Wanyin. 

Free entertainment!

She waves at Mo Xuanyu. "You vanished so quickly out of Mo Village!" she says. "I was wondering if you were okay."

"Ahah, you don't need to worry about me, Lan-guniang."

"You seem to have a nose for trouble."