This age is marked by conflict between the Primordials and the new Gods and their servants.
The new Gods create the Sidhe to help them combat the Primordials and eventually succeed in destroying or imprisoning all of the Primordials.
Among the Sidhe arise the first Archfey. Sidhe who have become powerful by seizing the fading powers of the dead Primordials

Arda and the other Mortal worlds begin to pass out of the mists.

For untold generations the Sidhe have lived with their gods in harmony. However the gods now tell their faithful that the worlds are seperating and that soon all will be in the mortal plane.

Some Arch fey seeing this as a chance rebel against the gods and resurrect some of the lost arts of the Primordial Titans to create pockets of Faerie that will not assimilate.

The ever changeable Sidhe take on new forms that appeal to their nature. Some become the Progenitors of Elves and Dwarves and others of the good or neutral demihumans, while others of a darker nature become the Goblins and other humanoids.
Thus the Bright Court or Seelie Court is founded as is the Dark Court or Unseelie Court.

The civil war lasts until the gods intervene and the worlds are separated from the mists. The differing factions became the new races of Arda, while the Arch Fey and their more powerful servants are able to keep small pockets of Faerie alive, yet adjacent to the mortal plane. These pockets are called the Feywild.

The mortal plane was the sole domain of the Faerie Races that when the gods created Men, many saw them as a lesser creation and ignored them or in some cases enslaved them . As this age drew to an end, it was at the hand of huge human empires who threw down their much more magically inclined masters by sheer numbers and force of will.

Human Empires seize control over most of the world. The Tarnish Empire marches forward like locusts until finally being defeated by internal politics and infighting. Eventually falling back to it's original borders.