The Spiritual Illusionary Pearl is a legendary artifact. It resembles a large exotic pearl with a bright luster and constantly shifting colors that glow with multicolored lights.[1]
In combat, the owner of the pearl can activate it to trap anyone stronger than its wielder inside of an illusion. Even though it isn’t deadly itself its still a special and valuable treasure that can allow its owner to survive difficult situations. Aside from confusing its enemies, the pearl also possesses other abilities.[1]
Nie Li found this treasure deep in the treasury of the Void Illusionary Divine Palace. When he approached it tried to first trap him in an illusion, and when that didn't work, it tried to escape. However, Nie Li was able to use the Myriad Miles Rivers and Mountains Painting to successfully trap it.[1]