I was playing arena with 1 mountain and a 1 mana goblin in hand game wouldn’t let me play the card in ranked. It glowed blue like it was about to play it on my opponents turn and stayed fixed on the screen during their entire turn couldn’t select it following turn after my timer ran out as I tried to play the card. Either bad networking on wizards end or opponent was exploiting some latency issue their handle was ShameWizard