Just had a casual play opponent hit me for 24 damage in one turn, with windfury on a heavily single-turn-buffed minion. Ouchie! Still won that game, though, as he emptied his hand doing it and then got minor cards the next two rounds while I finished him off. 
So what is the largest single-turn damage you have received but survived? I guess with armor it could go above 30. Same question for most single-turn damage inflicted, survived or not.
Also, I got a confusing (to me, anyway) message pop up about the April Season. What is that about? Is this related to Ranked play? I have not tried that yet.

So what is the largest single-turn damage you have received but survived? I guess with armor it could go above 30. Same question for most single-turn damage inflicted, survived or not.

Also, I got a confusing (to me, anyway) message pop up about the April Season. What is that about? Is this related to Ranked play? I have not tried that yet.