Breeding light dragon with earth
Either buy it for 1,425 gems or breed it using the cactus dragon and the crystal dragon in the breeding cave.
Breed any legendary Dragon with the element of which you want the pure. For E.G Breed Fire dragon with legendary to get pure fire dragon
soccer and cool fire, but you must spend five gems for the breeding boost.
You cant get a gold dragon without gems you need to be a memmber i think and i think your dragon can be other colors
You have to use a Fire and Water Dragon
Diamonds, emeralds, saphires, peridot, and topaz are some crystal gems.
Cold left firefly right
Poo / Armadillo / Petroleum / Cool Fire /Soccer / Gummy/ Pirate to get legendarydragon the same to get mirror crystal wind
You get five gems for winning first place. You get 2 gems for winning second place. Select a dragon that is at least partially from the element the Colosseum is using that day.
You have to breed one; though it will be very hard.
Breed a mud dragon and an air dragon. It worked for me first time. It will help if you get both dragons to lvl 10.
Crystal and Text are the most powerful gems in the cave