Hearthpwn

I made this deck for the 'Debt Forgiveness' achievement. Unlock 9 or more mana crystals with one overdraft.  

The combo can be done with no enemy minions on board, but it gets easier with enemy minions, as long as they have less than 3 health. The combo is as follows:

1. Terrorguard Escapee. (3 mana) It gives 3 1/1 minions for the opponent. 2. Play perpetual Flame (1 mana). That Gives 3 overload. 3 Then Lightning bolt x2 (2x1= 2 mana). 2 overload. Or Lightning Bloom x2. Overload 4. You can play Lightning Bloom first then Lightning Bolt if you need the mana. Then finish with overdraft.

Total mana = 3+1+2+0+0+1 = 7 mana. It can be done at 3 mana because lightning Bloomx2 gives 4 extra mana.

Overload = 3+2+4=9. 

You can put in a second overdraft to make the achievement easier. I only have one so I only put in one. If you have two you can remove a peasant. Most of the cards are just there to stall the opponent or to draw to get to your combo quicker. I had to balance carddraw and staying power because the meta is so aggressive. You want to survive long enough for your combo.

Good luck and happy achievement hunting.