My Beautiful Dark Curse

when hunting a monster in the darkness of the night an unlikely friend comes to his aid in the nick of time saving his life. A Stunning fluffy black cat of all things making Geralt regret his entire existence. Since now he owes his life to a cat he takes the cat with him to the in where it meets Jaskier. the cat doesn't take to kindly to Jaskier at first but slowly except him after a treat. Geralt knows something is up with the cat when but can't really put his finger on it until he wakes up to find the cat isn't a cat anymore but something else far more bizarre.