The Fire Element is a quest item from The Minish Cap.
The Fire Element is one of Four Elements that Link acquires in The Minish Cap. It is the second element found, located in the Cave of Flames on top of Mt. Crenel. Along with a Heart Container, it is the primary reward for defeating Gleerok and clearing the Cave of Flames.
After Link acquires the Fire Element, he can then travel to the Elemental Sanctuary. Here Link can fuse the two elements with the White Sword, turning it into the White Sword (Two Elements). This will allow Link the ability to split into two.