Hearthpwn

A new take on an archetype from the glory of Un'Goro times:

Main things:

Krag'wa, the Frog: returning previously used Spells is amazing, especially with Reincarnate and Ancestral Spirit, making Krag'wa a great addition; you can also return Board clears, Ancestral Knowledge, Hex or Healing Rain in specific matchups; the battlecry can then be repeated by Shudderwock;

White Eyes: the anti-fatigue and somewhat anti-aggro and overall a good Taunt Minion; you want to multiply its Deathrattle in Fatigue oriented matchups, like heavy Controls;

Sylvanas Windrunner: a great mean of disrupting Big Priests and other archetypes running many Strong minions, like Even/Renolock or Big Rogue;

Sludge Belcher: the anti Aggro deathrattle Taunt of choice; swarming the board with them and their 1/2s with Taunt when they die is a mean of shutting down Even Shaman, Odd Rogue and other aggressive builds.

N'Zoth, the Corruptor: gives you a board of your deathrattles which you should have carefully killed and resurrected during the game;

Shudderwock: yeah, you know all those amazing battlecries mentioned earlier? How about we play them all again? More N'zoth, more Krag'wa along with Antique Healbots;

Replaceable:

Zentimo: his effect is amazing with all the single target spells in the build: you can Reincarnate up to 3 Minions or give them Ancestral Spirit and you can Hex 3 minions on the enemy board; that's all there is to it, really; might want to replace it with Dirty Rat(s) for disrupting Comboes and rely on Sylvanas and just Hex + Krag'wa to disrupt Control or Lightning Storm to disrupt Aggro better;

Hallazeal the Ascended: good for transforming all those AoE into Heal, especially Elemental Destruction; if Antique Healbots won't be enough; might be too much healing; wish there was some good Armor gaining for the Shaman; replace with Dirty Rat(s) (watch out for Big Builds);

Charged Hammer: it provides 2 Damage for 4 Turns, which helps controlling the Board; then, it replaces your Hero Power with a much better or rather more control oriented one; Hagatha doesn't seem to cut it in here for the very low amount of minions in general and Thrall well, it's useless;

AoE management can vary; Lightning Storm can replace Elemental Destruction; you should however remove Hallazeal if you do so;

Possible additions:

Da Undatakah: Originally I added it to the list, it feels abit clunky tho;

Kel'Thuzad: it still comboes fairly well with Ancestral Spirit and/or Reincarnate for a very sticky board, even better now that you can get additional ones from Krag'wa/Shudderwock; there is no Barnes in this list tho, so less Highrolling;

Barnes: No, seriously, too many low rolls in this build to consider it reliable; the highest rolls would be Sylvanas or Kel'Thuzad (if you added it);

Dirty Rat(s): there is alot of Big Priests, Big Rogue et simila around now, with Kingsbane and Druid nerfed; less OTK comboes, which Dirty Rat is the master at dismantling; running at least 1 perhaps would be great, as Shudderwock will also copy its Battlecry; disrupting Renolock is also good;

It's a rather fun build. Some things could be replaced/changed, tho.