I tried 3 runs of underground arena. Last couple runs I was just playing against constructed decks doing the modern hearthstone bullshit.

Just a reminder before I disappear once again - Entomb used to be the most hated card in the game. Can you imagine such a world. It's how the game was and should be. None of this 'I draw/ generate 6 cards, play 10/10 of minions all on 5 mana' turn after turn kind of shit.