Evident's Comments
Godkillerwx's #1 NA Season 12 Warlock Zoo
Archer isn’t that uncommon in Zoo. It saw play in prior seasons when one health minions were popular. Trump used it in his Season 2 Warlock Zoo deck: http://www.hearthstonetopdecks.com/decks/trumps-zoo-warlock/
It punishes decks like Face Hunter and Mech Mage.
Godkillerwx's #1 NA Season 12 Warlock Zoo
Archer can get value from picking off one health minions or divine shields, and it works as a body for buffs from Abusive Sergeant, Dire Wolf Alpha, and Defender of Argus. You could just add a second Piloted Shredder or Harvest Golem if you really wanted to replace it.
Godkillerwx's #1 NA Season 12 Warlock Zoo
I asked him on Twitter, and he confirmed that it was.
Pesty's Season 12 Tempo Mage
There is none, I would suggest a second Zombie Chow, or go for another tech card like Harrison Jones or BGH. Nothing is great because Sylvannas is so unique.
Strifecro's Kinguin 3 Midrange Paladin
There’s no great replacement, but Sunwalker plays a similar role. I would probably just add a second Sludge Belcher.
Hearthstone Card Backs List and How-To Unlock Them
You have to beat all of the Heroic matches in Naxxramas to unlock the card back.
Hearthstone Season 12 – March 2015 – New Card Back: Ragnaros
You need to make it to rank 20, and you’ll receive it at the end of the season (April 1st).
Lifecoach's Heroes of Cards 5 Handlock
I usually try to post every deck from a tournament, and it becomes difficult to remember which decks I already have and how much they differ.
Voidcaller
No, Battlecry is only triggered when it is played directly from the hand.
Updated: Naiman's Season 11 Midrange Hunter
There’s no real good replacement for Ragnaros. I would add a second Sludge Belcher or a second Eaglehorn Bow.
Hearthstone Card Backs List and How-To Unlock Them
You will be awarded it at the end of the season.
Hearthstone Card Backs List and How-To Unlock Them
Yes.
Edit: You will receive it at the end of the season.
If you value the weapon destruction then there’s Acidic Swamp Ooze for Harrison. Nothing really replicates The Black Knight, but my rule of thumb is to just add an extra copy of an existing card in the deck. In this case, I would add a second Sludge Belcher or a second Zombie Chow. If you want a 6 drop then you could use Piloted Sky Golem.