Blizzard just released the details for their latest patch, which brings a ton of changes to every game mode.
Patch Notes: https://hearthstone.blizzard.com/en-us/news/23935323/26-0-4-patch-notes
Timestamps
0:00 Nerfs
4:23 Buffs
15:01 Duels
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News | Hearthstone | CRAZY BIG BUFFS!! Is Death Knight dead?? Wild & Duels saved?!