oh yeah draw both your 9-drops

Echo of garrosh!

It bothers me that the meanest card in the set is some Lovecraft fanfic.
Blood Warriors is where I start to get concerned for the color pie. Can Warriors do anything to damaged things? It's a cool card, and could probably only exist in Warrior (hybrid class cards when), but it also doesn't seem like something Warriors should have.

Hearthstone barely has a color pie to begin with. I think the card is fine.

It's more pronounced that I initially gave it credit for. Paladin and Druid doesn't have unconditional targeted hard-removal, Priests have all the stealing, Druids have ramp, classes with healing specs have healing, divine shield, stealth and windfury are mostly relegated to paladin, rogue and shaman (Al-Akir being the exception), Rogues don't get large clears without setup. Some of these might be trends as opposed to themes, but I think there are hard rules the design team tries to abide to.
Either way, both the fantasy and the mechanics of Blood Warriors is really strange to me in its class. I would probably buy it better with a more mundane name, like something related to recruitment. It just doesn't jive y'know.

I can't decide on whether Hammer of Twilight is a dumb or great name. Maybe it's both. (Twilight's Hammer is a cult in the Warcraft universe, for those not in the know.)

Hearthstone has no color pie, they will give classes whatever they feel is nice for whatever archetype they want to push for that class, and I expect that to change a little every standard. I think going forward it will get more pronounced but for now balancing 9 colors is not that realistic imo.

for now, hearthstone has something resembling a pie, but i think it will get less pronounced as it moves forward.

The Hammer of Twilight is the weapon that Cho'gall wields.

wow it's an actual thing
Now that you gave it importance I'm kind of disappointed in the design. You should have let me live in ignorance, where it was still a nice, simple design.
It's weird to me that these thing aren't Legendary. They aren't in WoW either, but these things are supposed to be unique. I guess they would rather have the Legendary slot for a creature, which is fair.

only minions are legendary

You are in a set where everyone is being transformed and empowered by Old Gods.

Also, WC3 Blademasters, which are now translated as Warriors, I believe, did create copies of themselves.

blood warriors sounds like something garrosh's warlocks would do.

Holy ****. You get 13 mana worth of stuff (a Reckless Rocketeer, an Evil Heckler and a better Raid Leader/Warhorse Trainer) for 8 mana. That's Dr. Boom level of value.

10.5 at best, assuming the value to mana cost is linear. Huffer and Misha are both worse than 4 mana cards, while Leokk is only +2 Health on an unplayable one. They're all in "somewhere between 3 and 4 mana" territory.

Blood warriors is nice because both epics from TGT for warrior were quite meh, and call of the wild is neat late-game for hunter

well, as Eph points out it's not unreasonable to count Leokk's bonus when considering Huffer and Misha's strength. you get the three together, and you get to attack with Huffer and likely block with Misha before they can remove Leokk. 13 still seems generous because Rocketeer isn't great and also their impact in the late game is very different from early, but I can see where the figure comes from.

dark wispers has infinite value because wisps cost 0

That card is expensive but helps push control Hunter.

no, it would have no value because 5*0=0

Wisps have an undefined mana to stat ratio and everyone knows that five times undefined is infinity.