Curse of Naxxramas was the first Hearthstone solo content expansion. I am slowly working my way through it. When it was first released, players could unlock different wings with either gold or real world currency. I chose to spend gold.
Instructor Razuvious is the first boss in the Military Quarter of Naxxramas. My first attempt to beat him ended in failure. The screenshots in this blog were taken on November 12, 2016.