Sindragosa took me three tries, the rest I managed to beat first attempt, so I was a little disappointed by the challenge. Still, I may have gotten pretty lucky against putricide, I played that new secret that allowed me to get two copies of a minion in my hand, and it turned out to be the minion that dealt 3 damage to the opponents minions at the end of your turn, so putricide could never establish a board. My first try against Sindragosa I lost because she got a truesilver champion with draconic operative, and pushed herself below 20 health with it, freezing two of my minions. My second time against Sindragosa I tried mage, but that card that deals damage for spells in your hand was too brutal to play mage, I died super quick. The next game I decided to go back to paladin and just didn't attack Sindragosa until fatigue, and won easily.
The levels were pretty creative, though, and I kinda wish there were a heroic mode for them.
Yes, it was fun, but I have a question, some of you tried to defeat sindragosa with freeze mage? I tried 6 times and every time sindragosa killed me on turn three like if it was programmed to avoid freeze mage