The Ancestor's Mark on Lin Xiao's body was different from the one belonging to the Emperor of Myriad Forms.
The Emperor of Myriad Forms' Ancestor's Mark was a portion of the powers once wielded by the Emperor himself, and anyone who obtained it could partake in the Ancestral Powers once controlled by the Progenitor – namely, the boundless and endless Strength.
However, the Dream Mark on his body was the very location of the Dream Ancestor Tishar's True Body. Her True Body was now hidden within his Soul, utilizing his Soul's shell to conceal herself, evading the pursuit from the True Nether Ancestor. The shell of the Crystal Wall System's Core could isolate everything – even if the True Nether Ancestor were before him, they would be unable to penetrate his Soul's shell and see Tishar hidden inside.
