Speaker of the Silent Word —
Common Priest Minion
Battlecry: Spells your opponents cast cost more to cast next turn.
2/3

Psychic Scream
Priest Spell (R)
This spell costs (2) less if you are in Shadowform.
Deal damage to the enemy hero equal to the number of cards in their hand.

Tome of the Harmless Wound —
Epic Priest Spell
Your life total can't be reduced to less than 1 until the start of your next turn.

Saraka the Lighteater
Priest Minion (L)
Can't attack.
Whenever you restore Health with an effect, deal that much damage to a random enemy.
0/8

Blooddrinker Poison
Rogue Spell (C)
Your weapon gains 'Damage dealt by this weapon also heals your hero.'

Ice Pick—
Rogue Weapon (C)
4/1

Backalley Deal —
Rogue Spell (R)
Discover a Poisonous card.

Recuperate
Rogue Spell (E)
Restore 5 Health to your hero and draw two cards. This must be the only card you play this turn.

Vixton Pinchwhistle —
Legendary Rogue Minion
Your Wicked Knives have +2 Attack.
1/3

Tortollan Animist
Shaman Minion (C)
Battlecry: Adapt your totems.
2/2

Call of the Elements —
Shaman Spell (R)
Summon the basic Totems until you have one of each.

Commune with the Elements - 10
Shaman Spell (E)
Overload 10
Draw spells from your deck until your hand is full. Their mana cost is 0 this turn.

i haven't followed hearthstone in years

That spell is broken as ****.

The One Totem
Legendary Totem ─ Shaman Minion
At the beginning of your turn Discover a Totem.
0/3

Eh, not really. How likely is it to win you the game that turn? If it doesn't, you probably lost. Reminds be of Yogg-Saron. I mean really, what's the most OP thing you can do with it?

Should probably be regular cards and not spells, though, or else you can just fill your deck with burn for an easy win. Lightning Bolt x2 Lava Burst x2 Jade Lightning x2… +1 spell power totem and that's game right there. So yeah then I guess it's probably broken. But if it were just regular drawing I think it'd probably fine. You'd have to seriously sacrifice your early game to get any value out of it. Only problem is then it feels kinda Druid-y. Anyway. Reminds me of Primal Surge. It'd be better if it were Legendary somehow. The point is I love the idea of a 10 mana spell with Overload 10 and this comes pretty close to what I'd hope that would look like.

Blood Boil —
Warlock Spell (C)
Deal 2 damage to a minion. If it survives, it gains 3 Attack.

Its designed to win the game most of the time you cast it. The ideal is to draw into enough burn to outright kill the opponent, and if not to get them low enough while wiping their board that you have an opportunity to win even while effectively losing your next turn. I never played while yogg was a thing although I still followed the game at that point and I guess he was too strong and this card is similar. It should outright win you the game more often than pre-nerf yogg did, while leaving you in a worse overall position when it doesn't than pre-nerf yogg did. I was worried about drawing cards in general because that would make the card more inevitable since it probably both clears your opponents board and puts you in a really good position to win within a turn or two, so it ends up being slower but more consistent that way. It could be that the burn is too consistent itself though, in which case I might be tempted to reduce the number of cards you draw (although that detracts from the wow factor of the card which i think is important)

getting any spell power to stick in a meta where people run this is probably also not trivial.

Fel Chains - 1
Warlock Spell (R)
Targets a minion. Until end of turn, damage dealt to that minion is also dealt to adjacent minions.

Reign of Demons -
Warlock Spell (E)
Non-Demon minions becomes 1/1.
Demons minions become 5/5.

I don't remember enough of Hearthstone's wording to word properly.

Gul'dan the Betrayed
Warlock Hero (L)
Battlecry: Destroy all friendly Demons on the field or in your hand. Equip a Soul Cleave with Attack equal to the number of Demons destroyed this way.

Soul Cleave
Warlock Weapon (L)
Lifesteal. Soul Cleave can't be destroyed.
*/2

Enslave
Warlock Hero Power
Gain control of an enemy Demon or destroy a friendly Demon and add its stats to your weapon.

No idea how to cost this. It seems weak. The flavor is Gul'dan becomes a Demon Hunter but ironically it's for a Demon deck.

Oh hey, I made the paladin legendary.

Furious Challenger
Warrior Minion (C)
Taunt. When this is dealt lethal damage, you gain that much Armor.
1/4

Bloody Tactician
Warrior Minion (R)
Battlecry: Replace the cards in your hand with Shield Blocks.
4/4

Shalamayne
Warrior Weapon (E)
Has +1 Attack for each enemy minion.
0/3

Wings of the Val'kyr
Warrior Spell (L)
Enter Skyhold, where attacking characters can't be reduced to below 1 Health.

The board transforms into Skyhold.