Lu Yuanming's sixth Absolute Attribute: Absolute Shadow!
As the first Absolute Attribute after the qualitative transformation, Lu Yuanming could already enhance attributes beyond the Five Senses and the surface of the physical body, even reaching into some abstract concepts, and the shadow was exactly such a thing.
A shadow is not an organ or sensory organ of a creature. To be precise, a shadow is merely the obscuration of a creature's physical body under the influence of light, meaning the physical body blocks the light, thereby producing what is called a human shadow.
But when the Absolute Attribute is condensed, the sixth Absolute Attribute can indeed condense into the Absolute Shadow.
The reason for condensing this was after Xun Xiaoyu analyzed the current situation for him.
