The diamond dragon is an extremely rare Dragon Story monster available at level 10. You can get it by breeding two dragons that together belong to at least four different types and will likely take a lot of tries.
Steps
Step 1. Verify that you have reached level 10 in Dragon Story
Your level status is displayed inside the star in the upper left corner of the main game screen.
If your level is too low, press the "Goals" book and complete the necessary steps to get to 10
Step 2. Click on Tana Breeding
Step 3. Choose one dragon per column, so that you get to four different types
The types are: Black, White, Red, Blue, Yellow, Pink, Purple, Green, Royal, Rainbow, Fairy Tale, Mythic, Cosmic, Olympus, Zodiac, Gem, Metal, Stone, Tropical, Dino, Egyptian, Champion and Soccer Player. For example, try pairing an Aurora dragon (Green, Purple, and Blue) with a Yellow one.
- For best results, pair an Island dragon (Green and Blue) with a Firestorm (Red and Yellow). It has been confirmed that this pair can give birth to a Diamond dragon.
- Try these other pairs, which have a 44% and 15% success rate respectively: Aurora + Mirage, Atlantis + Aquila.
Step 4. Press "Play"
The dragon couple will give birth to an egg, which will begin the incubation period. The diamond egg is light yellow in color and features a light blue diamond on top of blue waves.
Repeat steps 2-4 until you get a diamond dragon. Its rarity is considered Ultra Rare, so it can take a lot of tries
Step 5. Wait for the egg to hatch
It will take about 44 hours.
Step 6. Open Dragon Story again after 44 hours
You will find your new diamond dragon waiting for you.