Very little is known about this age, the only things that can be safely assumed is this is the period when Guthix discovered a "blank plane" called Gielinor and shaped it how he pleased. A possible end of this age is when Guthix descended deep underground and began his long sleep until the end of the God wars.
The Elder DragonsEdit
An alternate theory proposed in the Book of Folklore links the creation and 'lifeforce' of Gielenor with the existence of an ancient race of creatures known as the Elder Dragons. As long as the Elder Dragons remained the world would continue, though the extinction of the aforementioned Dragons would result in the 'end of the world'. It is possible that the Elder Dragons could be the Dragonkin that Robert the Strong annihilated, however the Dragonkin are believed to be extinct, though the survival of a very limited number would tie in with the Elder Dragons and the world's continued existence. However the Elder Dragon theory is not widely known, nor popular with skeptic believing it to have been created to throw doubt on the idea of Gielenor being barren before the gods arrived.