Livingtale

In bark in a mysterious au that is made out of flesh and seems abandoned, but it turns out there is a giant abandoned factory that rests a worn-out king named Zane. Witness Zane's routine that he has taken for over 200 years. One day a rainbow winged skeleton named Ink stumbles onto this place called the Livingland.

Zane is a shapeshifter who is intrigued by the look of ink and decides to shapeshift into a skeleton. Ink takes Zane into different Au's unknowingly there was a evil entity named Isaac who is a parasite like angel that is slowly affecting the Au's Zane has traveled in. From there the false angel ends up absorbing into Ink known as Isaac. Isaac goes around infecting other Au's and making a army of his own to take.

It's up to Zane and other surviving characters to save what is left of the multi-verse.

[From Itch.io]