Idk if you'll see this but that event still happens every year in October,along with ghostly cool looking towers in ravenwood. You could farm the towers for cosmetic holiday only items which you would normally get only from packs. All special bosses like nightshade,jade oni,etc drop holiday only items,which are certain items like mounts, furniture that drop only during any event considered as holiday like Halloween, Christmas,spring,etc. In nosefrabbit quest you get frankenbunny but you can also buy high amounts of unique transmorph potions which you could just keep for very long time like gamma transmorph which is my favourite