[Hearthstone] Patch 20.4 & Wailing Caverns mini-set

The latest Hearthstone Patch 20.4 was released a few days ago (June 3rd). It contained a TON of goodies such as the Wailing Caverns mini set and the latest Battlegrounds update. In this post we’ll talk about what this means for the Hearthstone constructed meta and the Battlegrounds meta.