The Iron Dragon is a Metal/Earth hybrid dragon in the game DragonVale.
First discovered during the great wizard Dalfgan's maiden attempt to summon an unknown beast from ancient times, the iron dragon is a close cousin of the more common metal dragon. The large metal block at the end of its tail is intimidating to some, but we've been assured that it just uses it for communication. Hopefully they don't try to communicate with any of the visitors!
The Iron Dragon can be bred by using any two dragons, in either order, containing the Metal and Earth elements.