Hearthstone’s Hallow’s End event returns on Wednesday 17th October and runs through to the end of the month.
Players who login during the event will earn a free golden Witch’s Cauldron card, and there’s a brand new Tavern Brawl called “Monster Smash!” which will feature some of the Witchwood’s most notorious baddies.
Hallow’s End also marks the arrival of a brand new Paladin Hero which will be available to purchase as part of a special deal, which presumably lasts for the duration of the event. Blizzard previously detailed the hero amidst other recent changes in a previous blog post.
Source: Eurogamer Hearthstone's Hallow's End event returns, feels rather familiar