Liushen but make it tdtbpf
The War God's Feisty Pet Cat
Shen Yuan dies and transmigrates into PIDW
Except something goes wrong and he gets put in a cat body (close enough to shen jiu lets be real)
He has no idea what's going on or where he is and the system is less helpful than in canon.
It tells him the main mission is locked, and all other functions are under maintenance due to an error.
Before he can even start adjusting to cat life he's swooped up by some monster. It's strangely familiar but he's too busy freaking out over potentially being eaten to put the pieces together
Fortunately (or unfortunately depending on your perspective) the beast doesn't eat him right away. You see it's a mom, and she's taking this morsel back to her den to feed it to her young.
But before the ravenous little babies can tear him into little bite sized pieces, a very handsome powerful cultivator arrives to clear out the monster den.
His intention was to rid the country side of another dangerous monster, saving a cat was accidental if anything.
But now there's a bruised and somewhat bloody cat in his arms as he flies back to Cang Qiong Mountain