The EU Summer prelims will be played out over the 13th and 14th August 
2016. You can watch all the action on the Hearthstone Twitch Channel.
Here is the RDU EU Summer Prelims Zoolock Deck he will be using to try and advance to Blizzcon. Remeber, tournament decks are not always the strongest ladder decks, but there is a lot you can learn from playing with these decks.
Zoolock is a staple in tournament deck line-ups as it’s favored against a lot of decks and you can pretty much guarantee it’s going to win vs some of the other classes.