Scoria Dragon

Breeding
The can be bred by selecting an earth dragon to mate with a metal Dragon at the Breeding Cave/Epic Breeding Island.

Breeding an earth dragon with a metal dragon may also result in an Iron Dragon.

Earning Rate
Coin per minute: Level 1: 5 / Level 10: 34

Dragon Earning Rates without boosts.

Boost Calculation Guide to use with the page linked above.