At Blizzcon this year, between the big Diablo 4 and Overwatch announcements, Blizzard also announced a brand-new mode for Hearthstone, Battlegrounds.
Inspired by the rise of auto-battlers such as Auto Chess and Dota Underlords, Battlegrounds pits you against 7 other players.
You pick a hero. You draft cards. You match 3 of the same card to upgrade it. You take advantage of Battlecries, Deathrattles, and synergies. The heroes, which are different from the default nine, are quite varied and have different hero abilities.
And then your cards go to work, pounding away at the enemy players who are eliminated one-by-one until but one remains.