After acquiring the Dragon’s Scale from Farore’s Trial Link is able to dive and swim under water. With this new skill Link is able to enter Lake Floria and seek out the Water Dragon. Unfortunately Ghirahim beat Link there and had already attacked the Water Dragon. Link must return to the Skyview Temple and bring back sacred water.
After doing so Link enters the Ancient Cistern to seek out the first Sacred Flame.
Lake Floria Walkthrough
Lake Floria – Water Dragon
Return to Skyview Temple