If you want to have A LOT of reaking fun while also having an good win rate, this is the deck. It is not totally broke back like druid, but this deck is very strong for sure. And it is sooo much more fun to play than the main stream meta decks :) At this time i am 22-7 with the deck in top legend on EU.
Gameplay by Kiwiinbacon - Showcasing some hilarious moments against warriors
Damn it, we made 20+ upwotes, so here comes the strategy and mulligan guide :P
Well, the general game strategy varies from different match ups. In general this deck wants to generate tempo by playing minions on curve the first 5 turns. And then fuel your hand with card draws like Myra and sprint to have enough treats yo kill your opponent.
Against druid and when having mossy on hand, you often want to bait out the plagues, by going wide then play mossy and refill. I was not sure about the mossy tech in the beginning, but mossy have turned out to be insanely good in the list.
Play your minions on curve, and try to hold back combo ativators (often 1-drops) to be able to activate Minstrel, Vilespine and SI.
One of the factors that makes the deck hard to pilot is to know when to play vilespine to generate tempo by killing a small impact minion, and when to realise that you can afford to hold it back fot bigger minions. Like against Druids and Even lock, you often want to hit spine on Lich king, Giants and Hooked Reaver. But you have to read the situation and ask yourself: Can I win by holding vilespine back this turn or do I have to generate the tempo immediately to win?
If you got epsionage in hand, donæt be afraid or too greedy with the Myra. Myra makes you able to puke out many threats the following turns and often just finish your opponent off. When having espionage, you can go Myra and then Espionage so your whole deck is only 1- costs. Also you usually will summon some spiders, so the tempo is huge. Basicly, you have to try to recognize at what time you need to generate the tempo and when to hold back. Like against Odd warrior going all in on tempo is usually a bad Idea, since they will just reckless flurry or brawl the board. That means that you might just take the game to fatigue. I played some odd warriors, and in the game where my hand do not makes me able to generate tempo and push my opponent, I choose to play it slow for fatigue. You should win in fatigue since you can go Elekk + Epsionage and shuffle 20 cards back in the deck.
So this is what I think is the very most difficult thing to do correctly with this deck. How to mulligan is actually very hard. When playing zoo lock you just mulligans for 1 drops and keleseth, this is not the exact case with this deck.
For sure, if you are given 1 drops and keleseth you usually wants to keep the hand. But this is usually not the case. For example is always a keep, Elek and Striders are in some matches also keeps, for example against druids.
When facing aggro, you want to go more on the hard mulligan for 1 drops and keleseth. But when facing druids, hard mulliganing for 1-drop without having Cold blood in hand is often not correct since you might and up with a very expensive hand.
To break it down: If you want to simplify the mulligan, just look for 1- drops and keleseth. You will usually do well by doing so. Just be aware that keeping 3-drops against some decks are not bad as well.
If anything stands unanswered, feel free to ask questions in the comment box below and I will do my best to answer as many as I can.