Vanguard Dragon

Breeding
The can be bred by using any two dragons, in either order, containing the  Light, Earth, and Metal elements at the Breeding Cave/Epic Breeding Island.

Obtaining
The can be obtained by collecting a total of  14,000 after completing one of its spellforms during the Secrets of Spellform.

Earning Rates
Boost Calculation Guide to use with the page linked above.