Hearthpwn

Dream OTK without Thaurissan:
1. Blade of the Saga (4 mana left)
2. Young Brewmaster (2 mana left)
3. Shadowstep the Brewmaster
4. Another Brewmaster (0 mana left)
5. Shadowstep the 2nd Brewmaster
6. Murloc Tinyfin
7. Young Brewmaster on Tinyfin
8. Replay the Murloc Tinyfin
9. 2nd Brewmaster on Tinyfin
10. Replay the Murloc Tinyfin again
11. Wisp
12. Wisp

I tried to give Rogue a strong finisher with something akin to the burst power of mage. The card is meant to be used in a "steal your stuff" deck and combo with Burgle and Swashburglar. At most the card could do 18 damage at a time provided you've stolen 6 cards from your opponents deck. Here is Firebloom Toxin as well for reference to the cards effect. 

Shaman would be the easiest abuser by following up with Elemental Destruction and hoping for at least two 5 damage hits.

Priest can also do it with this + Auchenai Soulpriest + Circle of Healing + Flash Heal.

Card remains balanced because to trigger the OTK you have to be able to keep your opponent's entire board clear before playing the combo otherwise you don't kill them and they just ram your face in next turn.

(Sorry for double-post I messed up inserting the image earlier. Content remained the exact same though)

This card has so many OTK options it's hilarious. Let's start with the main two: Rogue and Mage. For mage, you could play Archmage Antonidas, the follow up with Fae Gate, Millhouse Manastorm and then win by playing any other spell. As a Rogue, you can play Gadgetzan Auctioneer, Fae Gate, Millhouse Manastorm, Shadowstep on Fae Gate, Fae Gate, Fel Reaver, your entire deck.

It would be cool to play Deathwing on your opponent with this card as well.

OTK Combo: Emperor Thaurissan reduce the cost + Traitor Soldier cost 6 + Protect the King! cost 2 + Bolster cost 1 x2  = 10 mana 32 damage.

Examples when used with Emperor Thaurissan:
Shieldbearer + 2x Power Word: Shield+ 2x Divine Spirit = 32 damage
Eerie Statue / Mogu'shan Warden + Power Word: Shield + 2x Divine Spirit = 36 damage

Here is my submission : 

The combo : 

Stand Against Darkness + Warhorse Trainer + 2x Blessing of Might + 2xRecruits Last Stand All of them reduced by Emperor Thaurissan, it makes 32 damage using 10 mana exactly and 6 cards. 

Hope you'll like it ! Good Luck, guys.

OTC, is Thaurissan on this card and a Fallen Hero then play 2 wisps then 2 target dummies then my card then Cordarra Drake and fallen hero. then ping the opponent face down. which one do you guys think I should use as my submission? choose 4 mana because it prevents people using on turn 7 when you have 1 hp higher than your opponent if this cost 1 mana.

1 tick on Emperor Thaurissan then:

1x Frostbolt -> 2x Ice Lance -> 2x Fireball -> Arcane Bolt

Frostbolt costs 1  9 mana left

2x Ice Lance costs 0  9 mana left

2x Fireball costs 6  3 mana left

Arcane Bolt costs 1  2 mana left and the enemy Hero is dead. ( Reduced by 5 from the spells and reduced by 1 from Emperor Thaurissan.)

The combo is Void Torrent + Shadowform + Mind Spike + Shadowform + Mind Shatter + 2x Mind Blast.

Emperor Thaurissan would have to tick on all of the cards once for the OTK to work. 

2x Mind Blast could also be replaced with 2x Flash Heal and Embrace the Shadow.

Btw Void Torrent is the new artifact weapon ability coming in WoW: Legion for shadow priests. I thought since the game was based from WoW, I would make a new spell from the new expansion. 

PRIEST COMBO:

1- Emperor Thaurissan this + 2x Mind Blast (at least one).

2-Get Prophet Velen killed.

3- Play this, 2xMind Blast

ROGUE COMBO:

1- Emperor Thaurissan this + (at least one)... Sinister Strike, Shiv, Esviscerate.

2- Get Malygos Killed.

3- Play this with 3 spells (any combination of them)

Warrior Combo:

1- Emperor Thaurissan this + Bran Bronzebeard or Whirlwind

2- Get Grommash Hellscream Killed

3- Bran Bronzebeard, play this, Inner Rage 1 Gromash and hit face, Whirlwind the others

I didn't calculate all the possible combos, so i present one Emperor Thaurissan for one turn then Netherspite+Holy Smite+Holy Smite+Mind Blast+Mind Blast = 32 Damage* (and thats because the Spell Damage counts only when you (HERO) cast it, when Netherspite cast it it doesnt count, so 32 damage).

EDIT: Fix the wording, change "Whenever you cast a spell" for "Whenever you play a spell" thx SDhn2a for the Heads-up.

There are many variants of the OTK and most require Emperor Thaurissan. I use ((( ))) to indicate ticked cards.

(((Totem Golem + Totem Golem +Flametongue Totem ))) + HP or another 2 cost totem + Totemic Might + Totemic Might + ((( Primal Fusion + Primal Fusion ))) -> Ascension to face.

There are many possible combos and variants for an OTK.

This cards is costed at 5 mana because besides the OTK, when would you use this card. there is the downside of losing minions and could be costed at 4 but that would make OTK a bit easy. THis card could deal alot of damage but in most cases not a OTK though it is possible.

I liked the idea of giving Druid some better synergy with their Wisps. This requires quite a lot of pieces to be an OTK, but I think that makes it much more balanced. It also opens up a bunch of different interesting options for Token Druids, which I like.

OTK (after all cards have a Thaurissan tick) -> Wisp Mother (2) + Dark Wispers (5) + Wisp (0) + Savage Roar (2) + Savage Roar (2) = 11 Mana, so you'll need to throw in an Innervate at some point, for a 6 card combo. The Innervate also allows you to only get the Thaurissan tick on three of the cards instead of four.

This provides 5 damage per Wisp, and 4 damage from your hero, for a total of (6*5) + 4 = 34 damage.