The Wynter is a magical creature with a huge aura of cold. The Wynter affects a realm months before it arrives with signs of plant life dying due to the cold and days shortening as it absorbs the light.
The Wynter is an essential part of a realms cycle; its arrival is the start of the essence returning to the realm itself, back into the ground and into the crystals below. This is believed to be part of a process that keeps a realm in the sky. Without the Wyter it is believed that the essence of the realm would be absorbed into all its plants and creatures and the realm would plummet from the skies.
But an extended Wynter will eventually kill everything on the realm, so the Wynter is usually driven off by the realms’ most honoured Shari before too long, in order to maintain the equilibrium and balance of the cycle.