|“Now you must use it to create the Fusion Dragon. Only a Fusion Dragon can punch the depths of the Boiling Sea, and only the Dragon Blade can create one.”|
|— Ray, Out of the Fire and Into the Boiling Sea|
The Fusion Dragon (also known as the Water-Fire Dragon) is a Elemental Dragon of Water and Fire that appears in Hands of Time. It is a dragon made out of Kai and Nya's Elemental Powers using the Fusion Blade.
Symbolizing the unity of Fire and Water, the two-headed Elemental Dragon of Fusion is the only creature powerful enough to withstand the fierce environment of the Boiling Sea. It can be summoned only by the Dragon Dagger and is so strong-willed and powerful that it must be ridden by the Elemental Masters of Fire and Water – only when both Masters mount it can it be controlled. Ray and Maya were the first to ride the Fusion Dragon, using it to plunge to the depths of the Boiling Sea to hide the Reversal Blade, and later Kai and Nya followed in their parents’ footsteps to retrieve that Time Blade to save Master Wu.
- This is the second elemental fusion dragon, the first being the Hydro Electric Dragon.
- In fact, the Hydro Electric Dragon is portrayed mainly as an Elemental Dragon of Lightning in the set and the episode, so this is the first "true" Fusion Dragon.