Dude this puzzle is just INSANE, much more complicated than any other puzzle in solo challenge mode. I originally tried to hatch the 2-7 minion and give it rush, or simply give Zenrui rush, but both approaches ran short of 2 points of dmg. Your solution totally astonished me, especially at the precise order you play cards at the preparation phase, where you have to kill as few minions as possible and leave 1 free mana. Every move has to be precise since you then need to kill nearly every minion with Kage Lightning to add up the dmg you need, and there's literally zero fault-tolerance, which is just INSANE... Anyway thanks for your video!
