Seas of blood filled their nightmares along with bouncing skulls and man-eating beasts. They witnessed the sea of blood was swallowing their beloved family members and friends. Before they died, the screams they let out frightened everyone until they had cold sweats.
It was perhaps normal to dream of this once. However, they were having it every day. Once they closed their eyes, they would see themselves running in the sea of blood and watching their beloved friends and family die one by one.
In the beginning, although everyone was suffered from the nightmares, no one wanted to voice it out. They thought that it would be a joke to let people know that they were frightened by such an ordeal.