Curse of Naxxramas Ep26 - Grobbulus

Grobbulus has a nasty set of cards.

This boss specializes in making a swarm of minions and can eventually buff them to incredible size. Additionally, his hero power is an AoE that can net him a 2/2. I found that a hunter deck digging for Unleash the Hounds is a good way to go. Scavening Hyena was an MVP as well because it seems that Grobbulus doesn't have much for single-target removal (thank goodness).