There are two Sols that Link must find to create the Light Sword. Each is guarded by a Zant's Hand, which can move through walls though apparently cannot travel outside. Sols can be placed in special pedestals that activate something, such as a floating platform. The Sols hold the power to transform Shadow Beasts back into Twili.
It is unknown whether they provide heat as well as light.
Behind the scenes
- The word "sol" means "sun" in Latin, Portuguese, Catalan, Spanish, Icelandic, Danish, Norwegian and Swedish.