The event kicks off on Friday, October 20th, and runs until November 1st, complete with a 100% experience buff. Once you grab the associated event item from the cash shop (it’s a freebie, at the cost of only your dignity), you can kick off the Witchmother’s Bargain quest, or if you did it last year, you can just access your old quest item for the buff instead.
Bosses will drop themey loot as well, but probably the best addition is something that simply wasn’t available last year because the system wasn’t in the game yet: a house! Tick off four specific achievements and you’ll be cozying up in a thatch-roof Exorcised Coven Cottage in exchange for some in-game gold. ZeniMax does note that players can also buy the home in the cash shop instead, but it’ll be leaving the cash shop in just a few weeks: “You will not be able to purchase this home for crowns or gold once the event ends, so don’t miss your chance to own this ‘haunt away from home’!”