Not a fan of the art downgrade. Where's his hat?
I'll hold my judgement on the effect until we see the whole set, but I already hate the artwork.
SN1P-SN4P rotates out alongside The Witchwood, whereas Witch's Brew will still be around for a year after. It'd be weird if it was the only Echo card in Standard.
You could also play it for fun, and get the packs as a bonus.
I've been playing a Silence Priest that seems to do really well against them. I haven't lost to a single Murloc Shaman yet. I'm not running Divine Spirit + Inner Fire, just hard board control with big minions. You field your big guys, keep killing off murlocs, keep healing your minions up, and eventually kill them when they run out of steam. The nice thing is even if they switch gears to kill your guys off, they need to use far more resources doing that than you did to summon them.
Problem is that the deck is utterly worthless against Bomb Warrior (and every control deck) and struggles against Rogue. However, it's pretty satisfying to crush murlocs.
1. This is the first set of the year, out of three. There are 270 cards yet to come. There will probably be at least one neutral dragon in there, maybe even a Legendary one. Judging by the Paladin cards, I'm guessing Blizzard will push a Dragon theme for them at the very least.
2. Year names have nothing to do with anything. If you thought this was going to be dragon-themed, that's your own damn fault. Nobody tricked you, and nobody lied to you.
Why though? The year names have never had anything to do with anything.
This actually has a lot of potential with Khadgar. In a theoretical Khadgar deck, you're going to get a lot of random minions. Being able to 'reroll' something bad is a huge boon, getting nearly guaranteed value from the reroll is great, and being able to do it twice is incredible. You can also use it on a summoner if the reroll isn't needed. Oh, and you take a chance and use this as a pseudo-Polymorph if you're desperate.
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Why there is no theory that the second expansion will be about Ogres. The color scheme is actually matching to Ogre empire on Draenor. I have seen this speculation long ago and it was pretty popular, so it is strange that you didn't include it.
Probably people that have no interest in playing the brawl at all and just hope that roping annoys the other player enough to concede and they get the win they need for the pack?