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Crystal dragon
This will be a crystal dragon.
A yellow egg with silver diamonds produces a crystal dragon.
The most effective method of breeding a glass dragon is using an earth dragon and light dragon. This has a 35% success rate. The egg is yellow with gray diamonds, and takes 12.5 hours to hatch.
there's no egg in Yellow. there is in Gold and Silver but not the earlier versions.
It varies
A storm dragon egg in Dragonvale is formed when a storm dragon mates with a moon dragon or a sun dragon. The egg looks yellow in color with a blue outline. It also has white snowflakes.
You can't maybe you can if you have jailbreak I think........
Lava dragon
about two hours
"The yolk of the egg is yellow" is correct. "Yolk" is a singular noun, so it should be paired with the singular verb "is."
You have to buy it. It is one of the main base dragon.