Hearthstone is getting a cool new feature for Halloween - the ability to pick cards from two classes when starting an Arena run.
It's a first for Hearthstone, which has previously stuck rigidly to its hero class system (although certain cards in last year's Gadgetzan expansion could be used by multiple classes).
There's a Halloween-themed Tavern Brawl as well, with a passive Hero Power for use and costumes to wear.
Blizzard is also giving away some freebies - a Whispers of the Old Gods pack and free Arena ticket next week (24th - 30th October) and a Knights of the Frozen Throne pack and second Arena ticket the week after (31st - 5th November).
Finally, there's the ongoing Nemsy Necrofizzle promotion, where you can unlock the alternate Warlock hero by joining a Fireside Brawl at an established location and battling on the same network. This is available now, and will run on past the end of the Halloween event.