Switch

The Switch or Altitude Switch is the cataclysmic event that marked the end of the first Sun and Era and the Beginning of the Second Sun and Era.

Origins
In the mid-First Sun and Era an extremely powerful god named Crüishendorm was killed by his sister and buried in Zmergmith Mountain. Crüishendorm’s dying wish was that his will be brought out from the Fire Layer of Hell and brought back to rest on his grave before the the stars in the Constellation of Crüishendorm formed a Syzygy. He promised that if it was not done, the end of the world would be brought on.

Effects
When the Scrollgivers, a group of adventurers, failed to complete Crüishendorm’s dying wish before the Syzygy, the world started to crumble. Every single point on the surface of the Earth rose or fell to the opposite altitude. Thus Zmergmith Mountain became Zmergmith Trench and the Deep Depths became the Mountains of Iìsgaròth. Only a few score individuals survived this Cataclysm, and the ones who did became practical demigods.