Hi, I'm Chaouc, greek hearthstone player.
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WITHOUT COIN--GOING FIRST
-You need to get 1-drops, search for them. Keep everytime Kindly Grandmother . Keep Scavenging Hyena or Crackling Razormaw if you already have a 1-drop at mulligan.
WITH COIN--GOING SECOND
-You need to get 1-drops as always, but in this case hold on 2-drops too. If you have a 1-drop already, you can easily hold Eaglehorn Bow or Animal Companion so that you can coin them at turn 2. This is more complicated and has to do about what matchup do you face. I would keep them surely versus Priest-Shaman-Hunter, because they need to get board ealy and these cards are high value cards for the mana payment.
If you have plenty of 1-drops to start, don't play Jeweled Macaw . Choose something else, cause Jeweled can be useful later on with the card it gives and can fill a turn where you would just hero power, plus it is the most weak statwise.
Alleycat can work pretty good with Nesting Roc on turn 6.
If you got a good early hand already, like 1-drop and 2-drop, and you face warrior, mind keeping Savannah Highmane because most people play taunt warrior with the new quest and Savannah is the ultimate win condition in that matchup.