It appears that Undertaker was just nerfed. A reasonable change I think.
Holy hell, they MEGA nerfed him. They changed it from +1 attack and +1 life per deathrattle creature to just +1 attack, without altering his base stats. I'm surprised that they didn't at least give him an extra life point to compensate, in which case he would have been almost identical to the Mage's Mana Wyrm which also starts with 1/3, and gets +1 attack per spell cast. Though, in fairness I suppose, it's much easier to play early game deathrattle creatures than it is to play early game spells, which are generally more expensive, at least the good ones. So all in all, I guess it was a decent change, though I don't much expect to see Undertaker played anymore.
What a complete balance blunder on Blizzard's part.
Constructed is what I'm used to with these, so I'll end up doing it the most. Arena has a cost to it, which annoys me a bit; typically when I'm interested in a particular mode in a particular game, I'm probably going to want to play it like 20 times in a row; cannot do that with Arena. So I've ended up just not having very much interest and have just been using gold on card packs.
Technically you *can* do that with Arena. There's a technique called "infinite arena" which allows you to keep playing Arena again and again as long as you obtain enough wins on each run to either break even or above 7 wins.
Without playing hundreds of Arena runs (or being some sort of card game genius) this would be difficult at best, however there's a nifty little tool that drafts Arena decks for you, giving you the best possible combinations of decks based on the cards you have to choose from. It's an awesome
free utility. You do have to sign up for it but it's free.
With the help of that and from watching some pros stream Arena (
Hafu is my favorite, just watch some of her), I've become an infinite arena player. I'd like to hit the big 12 but 11 is the best I've done so far. However, I commonly get 7 or more, enough to pay for my run and get the 'free' deck at the very least.
In terms of constructed decks, that would probably only be fun for me about a month after a new expansion was added. Anything after that has already most likely been figured out by the best players, given the simplistic nature of the card game itself, and the best decks at that point can simply be googled online and then crafted at will.