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Trap room dungeon boss is the least fun PvE experience in hearthstone
Seriously, this encounter is designed to make you feel helpless and stupid. Everyone who triggers an enemy secret is conditioned to think they made a mistake. And in this fight, you have no way to play around every secret in the game so you basically end up kicking yourself for every 3/3 with charge you give the boss.
Really frustrating design on this. Don't really know how any developer thought this was fun.
Dave Kosak
It's definitely one of the most intense experiences in the Dungeon Run (it's a rare encounter for a reason.) It's also immensely satisfying to beat, as others have noticed:
https://www.reddit.com/r/hearthstone/comments/7i9fks/i_had_a_pretty_interesting_win_condition_in_the/
If you're facing the room full of traps and aren't sure how to proceed, I'd rely on traditional Pandaren wisdom: "Slow down..."