Hearthpwn

So I'm a sucker for a cool animations, so I decided to make this card which pretty much makes a boulder slowly crushing each of your opponents minions and then rolls off the board. I chose to make it 9 mana because it's better than Twisting Nether which also kills your minions and Psychic Scream which in addition to putting your opponent's minions back into their deck put yours in there too. Another reasoning for the 9 mana slot is to make it hard for you to be able to use your hero power or summon an additional minion after using the card.

Burrowed Flash Mine.

Call this salty, but it is meant to answer turn 3/4 meta of summoning high-cost minions BEFORE it happens (Barnes/Y'Sharrj/etc.), to have the opponent reconsider their strat, and slow down the play to allow you to draw removals. It could be used mid-game vs a Skull of the Man'ari and late game to prevent/disrupt deathrattle swarms at the hands of N'Zoth the Corruptor.:D

I used "Burrow" and "Mine" from Burrowing Mine and Iron Juggernaut, "Flash" from Flash Heal, "When your opponent plays" from Counterspell and Mana Bind, "a minion that costs (8) or more" from Freed from Amber, and "Silence all enemy minions." from Mass Dispel.

To talk immersion, the mine is stealthed to simulate being buried in the ground. The trigger is heavy and takes a large minion stepping near it to set it off (I.e. 8-cost or more).