How do you get a metal dragon in dragon vale?

Metal dragons are a basic element dragon. The simplest thing is to purchase one from the market for 1,000,000 coins. They become available at level 17.

If you prefer to breed, you can do so with a plant and a poison dragon. This has about a 40% success rate.

Metal dragons take 8 hours to breed, and another 8 hours to incubate. They are white with golden plates on them. They give 1,000,000 XP upon hatching.