I played against TB_Thedestroyer on mtg arena, and I used judgement bolt on his nova hellkite, and it didn't die.. His creature only had flying, and the player didn't perform any actions when I used judgement bolt. It should've killed nova hellkite with toughness of 5, but it just hit him, and nothing happened. Is this a bug? Or is the player hacking? What's going on?