No attack? Just charge? Thats a cute dragon :-D
Cries for all unliving decks of course... but it's IMO another rare dragon (like forest dragon), that will be hated by all who use dragon-decks...
As you have no pic yet, what about changing the name to "Raiding machine" or something (charge without attack normally "hunts down" ressources)... adjusting costs to 17+17+17 would even justify unliving keyword (as the triggered keyword would give instead x12 giving 67 bricks (net) when quarry is 7... a better (but more expensive) clay valley, that can be summoned).