Nightmare Desert

In Chapter 772, Nephis explained that after reaching the top of the Spire, the Crimson Terror was in its most vulnerable state, having absorbed countless souls and being in the middle of an arduous evolution, and with the help of the Dawn Shard, she was able to strike her down. After the creature's death, the Spire became unstable, the Gateway collapsed, and the tower itself soon followed, forcing her to barely escape the debris. The artificial sun of the Forgotten Shore was extinguished, plunging the land into absolute darkness, while the labyrinth perished and the crimson coral turned grey and slowly crumbled to dust, leaving the area lightless and desolate.^[5]

Afterward, she traveled back to the Dark City, where she spent time hunting the remaining abominations and preparing for a long journey, killing many powerful Nightmare Creatures with the help of the Dawn Shard and the Nameless Sun. She considered trying to cross the Hollow Mountains, but abandoned the idea because nothing but death awaited there, so she chose another direction. Knowing that the deadly mountain chain stretched further than Ravenheart in the west and that going north would lead further away from human Citadels, she decided to travel east, hoping there might be a place where the Hollow Mountains were not as tall or unassailable, or where they ended. Leaving the Dark City, she retraced the path she had once traveled with Sunny and Cassie, avoiding the Ashen Barrow, until she reached the edges of the Forgotten Shore and crossed into a vast and terrible desert, where she once again saw the sun and the stars, marking her arrival at the desert.^[5]