Hmmm.......how about destroying a permanent of each type, a weapon, a shield, a pillar and a miscellanous (a shard, hourglass etc.)
Maybe raising the cost would be fine.
I personally don't mind if this card has the "fill your hand". However, Pyromania seems to me like destruction, not just destroying permanents. Maybe it should have a different name.
CURATOR COMMENT-Please use the following table code found here (http://elementscommunity.org/forum/index.php/topic,5039.0.html) in order for your idea to be considered. Also, try to remove those 'hard-edges' off your card image not only to make it look clean, but also so that the card frame fits the standard resolution sizes for the table.