Daily quest All Hallows’ end cannot be completed I’ve done 8 arena matches.
Decks that have available in December can’t be opened even though it’s December 10th.
thats because hallows end is over and the packs will be available in 10 hours from when i’m writing this 
But the quest is still there? Should I just re roll or?
what exactly does the quest text say again? i can’t remember
Currently says play a game in arena mode if I go to re roll it, it says - abandon quest for a regular one? This quest is apart of a chain and you will lose all progress
The 2019 Hearthstone Hallow’s End event Doom in the Tomb has concluded. Happy Hallow’s End missions are no longer eligible to be completed.
If you see a Happy Hallow’s End mission in your mission board, click the circular arrow button to replace it with a standard mission.
https://eu.battle.net/support/en/article/255208