Boom boss (also combined with Brann) is just broke… still. You can destroy over half of someone’s deck (up to 18 cards) with little strategy involved. If a warrior can survive until 10 mana (which they always can due to shield mechanics) they win. It takes little skill to execute and is very hard to overcome. Why not make the cards it affects just unplayable for a turn or if you have to, destroy up to 9 max cards? What I like about Hearstone is the strategy it takes to pull off a combo and the possibility for a good player to counter it, not these easy wins.