Firebat's Actually Good Yogg Mage

So. Yogg-Saron, Hope's End is back, baby! And he is amazing. This deck is a Firebat's version of a J4CKIECHAN's Big spell / Freeze mage, which he played on stream yesterday for about 4 hours. (here's the link for interested https://www.twitch.tv/videos/463866646?t=04h21m54s)

This exact version is extremly good against aggro (despite running 5 10-drops, yeah, I know), meanwhile having a nice little combo of 20-ing people in a face by casting 2x Pyroblast discounted by Naga Sand Witch, but I'm not done yet! You have the potential of casting up to 5 Puzzle Box of Yogg-Saron - s? - es? -os? Whatever. And it is *usually* pretty good, and since you can discount it to 5 mana, you can play something else if RNGesus will screw you up.

Praiseth be, Your Majesty, oh, the Allmighty one, and dont Pyro me in a face pls^^