All things in the world, whether alive or dead, like sunlight. Even if they don't admit it verbally, they cannot deny the fact that they need sunlight. The difference is just the amount of sunlight needed. However, one creature is an exception. They live and die at dusk, without seeing any light. No other creature has ever seen them alive. Someone once spent the night in a cave full of dead branches on a moonless night. He suddenly smelled a strange fragrance and groped to pick it. However, when the first ray of sunlight fell into the cave, all he saw were dead branches... As word spread, more people discovered this plant that did not see any light. Later, people called this legendary plant Kuiyin.