Petroleum Dragon

Breeding
The Petroleum Dragon is a rare dragon composed of opposite elements. As such, it can not be bred directly from basic dragons. Instead hybrid dragons have to be used at the Breeding Mountain or Ultra Breeding Tree. All possible combinations which may lead to a Petroleum Dragon Egg can be found in the Breeding chart. In the interest of simplicity and remove the need to make any more additions, here are all of the Water Hybrids on one side and all the Dark Hybrids on the other side. You may additionally breed a Water Dragon with anything on the right list and a Dark Dragon with anything on the left list, but not Water with Dark directly.

No possible combination will guarantee a 100% success. If different combinations have different chances is not yet confirmed. Poo, Pirate and Petroleum were not included, but can also be used. They were not listed because they are all rare hybrids with longer a breeding time.


 * Speculation based on probability, not known for sure:

Venom Dragon + Mud Dragon about 11.(1)% chances

Mud Dragon + Dark Dragon about 16.(6)% chances

Neon Dragon + Nenufar Dragon about 11.(1)% chances

Pure Earth Dragon + Dark Dragon (chances unknown)
 * A few efficient combinations [based on the length of the breeding time]
 * Blizzard Dragon + Neon Dragon [2 hours]


 * Nenufar Dragon + Neon Dragon [2 hours]

Damage Calculator
To explain, when attacking with Water, Petroleum deals double damage against Fire and Electric, medium damage against Water and Ice, and no damage against Plant. When attacking with Dark, Petroleum deals double damage against Water and Metal and half damage against Plant and Dark. When defending, Petroleum takes double damage from Fire and Dark, medium damage from Water and Plant and take no damage from Earth.

Counter Dragons

 * ​Pirate Dragon 
 * Soccer Dragon 
 * Venom Dragon (Lvl 15 to unlock "Ghost Cloud") 
 * Dark Fire Dragon 
 * Penguin Dragon