An entity that predates even Demise and is theorized to be the cause of Demise's very existence, among other timeless monsters.

After the world was first created by the Goddesses, before it settled into a comfortable form, the chaos of it all gave birth to Majora, the God of Chaos.

It gleefully reigned havoc over the new world, and especially its inhabitants. Its eyes turned everything it looked at into a vicious beast, some of which exist today, and remember Majora with either fondness or hatred.

Those on the receiving end of Majora's wrath prayed to Hylia, prayed to Farore, and Din, and Nayru, and to any other God that would listen. All of their sorrow, desire, rage, and hope pooled in the bowels of the Earth, and from all those emotions came a being which would come to be known as the Fierce Deity.

The Fierce Deity slew Majora, but what happened to him afterward was lost to time. However, the effects of both of their existences still remain today. The passing of time, the light of the Sun, the calm of the Moon, all these are the result of the battle between Order and Chaos.

It could even be said that the prophecy of Time, Light, and Evil that binds Hyrule in an endless cycle is also a result of Majora and the Fierce Deity.

The Legend of Zelda: Shattered Prophecy- Majora