This was a fun boss to play with. I ran a Reva squad with sentinels and a couple of ranged minions. Beat him on the first try, though it was with difficulty. My entire deck folded to frostburn with that special rule in place so I had to rebuild twice from scratch.
Most tilting about this boss was that he played around the sentinel that copies spells played by the opponent. This guy played units for 4-5 turns straight while the sentinel was in play. Then he finally killed it and played 2-3 spells right after. Either he was very clever, or this was an amazing stroke of bad luck for me.
The boss was quite beefy. Eventually I worn him down with ranged minions and pings from the arcanyst 4/4 that drains for one every time a spell was played by me.
