League of Legends (LoL) Question: Halloween skins coming back?

Hi guys! I'm a Katarina main and the only skin that I dont have is Kitty Cat, so yeah i want to buy it. The thing is that this skin is a Legacy one so i can't buy it from the shop right now. I've searched in the internet and found that is part of the Harrowing Skins. My question is, are these skins coming back to the shop this Halloween? I have the necessary RP to buy it but i dont know if I should save it or buy another skin form another champ.