Hahaha! Very nice, I really love how this made me chuckle a little. It's like the whole castle is under siege, and Uther is just turning is back to the guard and just being like 'Be quiet!'
I love the whole art style you did this in, the main colours of gold and blue are really soft. I love how you even selected the game-board that has these two main colours - and even Jaina, who's wearing them (hah, her expression is so indifferent to the siege and focused on the cards that it's awesome) and the detail in everything is just AMAZING. How the light falls on to the main characters and even that beautiful background...god I am sooooo in love with this piece!! You must have spent a whole load of time on this...very beautiful, very beautiful.
Thank you for naming down all the details! While I try to keep the main plot of the painting accessible even to non-gamers, I've included little things that only Hearthstone players will know. Its like a fistbump to people who play the game too ^^