This is very important advice -- I created an account just so I could share it.
You MUST purchase the first wing of Naxxramas before the Spring 2016 expansion. It will no longer be available after that moment.
As long as you have the first wing, you will always have the option of buying the rest. But if you haven't bought any part of it, you will never be able to. Even if you never intend to play in the Wild format, it would be a shame to miss out on the adventure. It's entertaining and educational, and you get a sweet card back for completing Heroic mode!
There's been a lot of good advice in this thread so far (do newbie quests, consider making a cheap aggro deck to climb the ladder, play arena runs as much as possible, and level up the base classes - I'd say to 20 so you can play tavern brawls) but this piece of advice sticks out best IMHO.
Getting naxx now will, ultimately, save you a significant amount of dust in the long run if you choose to play Wild format. Even if you decide you want to stick with standard, disenchanting all the naxx cards will give you a massive amount of dust. Definitely agree with this advice!
3
They told us why when they made the statement. It's because it makes more sense to just print a better version of the card in an expansion. (People will get excited about the better card, and Blizzard makes money selling the new one.)
1
1
Play your echo deck in Wild, but with Arcanes instead of Moltens.
3
22
8
2
When you first see him playing Elementals, you know to save your hard removal.
If you don't have any hard removal in your deck, you might want to rethink your strategy going into this meta.
4
17
Spending 9 mana for a pile of stats is not how you win Hearthstone.
2
At first glance, I was like, "Huh."
Then I was like, "Oh!"
Then I was like, "Oh, WOW!"
If you are among those saying this card is bad, you forfeit your right to call for nerfs later on. That's all I'm gonna say.