Hearthpwn

I've been messing with a ton of Celestial Alignment decks in Standard and in Wild, and I can tell you this deck feels like the best version of this deck in Standard. Feno has been climbing off and on with C'thun Miracle Druid in high legend. While this deck may lack tempo, the swing turns are absolutely mind-blowing if played correct. WARNING: APM can matter due to animation times.

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The power of this deck is in the Celestial Alignment and Cenarion Ward swing turns. The goal is to survive by removing the board and gaining armor while you're quickly cycling your cards. Once all your cards are one mana, you can pop off with Nourish mana increases, and massive card draw turns with Gadgetzan Auctioneer and Malygos the Spellweaver. NOTE: If you play Lightning Bloom before playing Alignment, you will have no usable mana. 

You have many win cons with this deck. The challenge with this build is knowing which one to go for. Your win cons are as followed.

Solar Eclipse into Cenarion Ward: This is your most common win con. This combo can be game winning at coming back against aggro decks. 8 drops can be pretty hit or miss, but a minion is a minion, and the armor gain is very impactful at keeping you alive for later swing turns. However, sometimes the minions you pull can be ridiculous and steam roll a win.

C'Thun, the Shattered: There are several ways to cheese out C'thun spells as well as the minion all in one turn. Mainly due to the insane swing of a 1 mana Forest Warden Omu. However, you can also lock out your opponent with the second Celestial Alignment and a large board so the C'thun can deal lethal damage on the following turn. Your opponent will only have one card to play, and they likely won't have any answer for everything you've presented. 

Yogg-Saron, Master of Fate: PRAISE YOGG OR YOU WILL BE BURNED BY THE ROD OF ROASTING. (Yogg is your hail mary. Play it when you don't have anything else or if one of the spin outcomes can win the game for you. Goggles made a few Paladins concede immediately.)

Good mulligan keeps would be Nature Studies, Wild Growth, Overgrowth, Fungal Fortunes. I would keep Alignment if you have Overgrowth, but it's hard justifying keeping it in the mulligan since you draw cards so quickly. 

If you have anymore questions feel free to let me know! I had a few cool highlights with this deck, so if you want to see some game footage, check out the video below!