Hearthpwn

Extremely strong deck I've been rocking on rastakhan launch. Still trying to figure out the best low cost minions but pretty sure almost all of them are core.

Strategy
Stall -  using your board clear efficiently (we dont have that many strong board clears, only 2 with equality, you have to use it at optimal times. always try to use equality + pyro, let the consec do the job for low health minions. 

Heal - You have massive heal, let the opp do some damage or use the new legendary so you can heal up. Remember of the synergy with the soup minion and try to use it in combination with the  heal 4, draw card / DK weapon / corpsetaker/ shirvalah. 

Win condition, how to do it
1)
Pretty easy, once at late game and as DK, use hero power and use your bounces to get one of each rider on to your hand, you'll need 3 to . You have 3 bounces (Zola and 2 of the 4 star guy) so you cant use them with other minions unless you can do win condition 2
2) If you manage to leave one Rider on the board, and have in hand a different one + Pixie, you can summon the one in hand, hero power, pixie, hero power. Win.

This deck, feel like it's already top tier, im on my finals so I cant really grind with it but i'll leave it for you to test it. 
Mulligans - Be smart, know what kind of deck your opponent is playing, if it's wide board always mulligan for consec, pyro and equality. Call to arms is a keep in almost all matchups as it will thin your deck out and cycle through it. Corpse taker should always be left in hand if you know the opp will have 3 health minion (Zoolock/odd paladin). Feel like this deck is easy to play, just use your board clears efficiently and dont mess up on the OTK. Will be updating this guide with some combos if you guys are interested.
 
PSA: try to save your crystal smith for when you can swing with the dk weapon for 10 heal. 
Extreme situation: If you manage to have a shirvala with low cost in hand, dk weapon and the 2 cost heal, you can heal for 32 Damage. Seriously broken.

Put thijs as proplayer since I got this deck idea from his boomsday lynessa OTK, made some various changes to update it. The deck feel like all the cards are core but that may change with the meta swing. Flex spot I would say is on the Soup minion and the protector, since against control you are better off using deathrattle draw a card (Thalnos/2 star guy that I forgot the name). Protector is extremely good against aggro and very useful to protect your rider to enable condition 2. Always try to save the target divine shield /any taunt minion to protect your rider once you can do the second win condition.