Recently started working on this deck and so far it's been surprisingly reliable.
Normal Shudderwock shamans tend to only focus on one win condition which is infinite heals and possibly damage (LifeDrinker) leaving them open to OTK's and other combo decks. With this list, I focused more on adding things to the combo that counter the decks that I constantly run into.
Mojomaster Zihi: Typically you want to go infinite then play him the turn after so all of your Shudderwocks are 1 cost making mana not a problem for anyone but your opponent. But against combo decks, you can play him just to slow down the game and deny their combo turn until you find the rest of your combo.
Coldlight Oracle: This is another card you can use against combo decks by possibly milling their pieces, other than that it's just a really efficient draw and unless you're fighting agro the punish of them drawing cards usually isn't as important and you finding your combo pieces in time. This along with your hero power and Shudderwock can also be a win condition by forcing your opponent into fatigue while you shuffle cards into your deck.
Elise the Trailblazer: I considered using baleful banker to shuffle more Shudderwocks in against fatigue matchups but wheres the fun in that? By using Elise you not only shuffle cards into your deck allowing Coldlight to trigger without pushing you into fatigue as quickly, but you also have tons of value from the packs in the event that Shudderwock fails or something. Feel free to switch it out for a baleful banker but for me, it's just way more fun.
General: You wanna look for your low mana battlecrys like Questing Explorer, Sandstorm Elemental, Coldlight Oracle and Instructor Fireheart.
Vs Agro: You typically wanna look for Volcano, Antique Healbot, Lurker Below, Torrent, and Sandstorm Elemental. In these matchups I usually don't go infinite and end up playing Shudderwock just to clear and heal but since they're usually not able to clear Shudderwock because of a lack of removal you can just bounce it back with Zola. Also in these matchups, you wanna abstain from playing Coldlight Oracle or Mojomaster Zihi unless absolutely necessary as you gain more use of your mana than they do unless you're already infinite.
Vs Combo: Follow the general mulligans but looking for Zihi early to deny their combo turn is essential, You're also gonna wanna use Coldlight Oracle to try and burn their combo pieces as that usually just forces a concede.
Vs Control: Follow the general mulligans, how you win these matchups is with Elise and Coldlight Oracles, You typically don't have any substantial board in the early game which strands their removal in hand, this allows you to mill them quite easily, in these matchups you also want to use hero power Zola on Elise so that your Shudderwocks (with hero power) shuffle 6 cards in effectively putting you at the fatigue advantage while your Coldlight battlecries push your opponent deeper in.
Feel free to try this deck out and give feedback it's greatly appreciated. I will continue to play it and update the list where I see fit but so far it's feeling pretty good.