Yi Yun did not doubt Poison Demon's words. One would not have any consciousness before developing sentience, so it was natural that it did not know who the two combating parties were.
Yi Yun looked at Poison Demon and asked, "In that case, did you absorb the energy within the skeleton?"
In fact, although Poison Demon was born out of the art of Great Poison, it now had little to do with the supreme existence. After all, the poison had undergone the refinement of divine fire and spent hundreds of millions of years absorbing the worldly essence and the energy within the mighty figure's skeleton. It had long undergone metamorphic changes.
Even that person that used the art of Great Poison would not have expected that the poison he used would gain sentience after hundreds of millions of years of evolution. Such an event required all sorts of fortuitous occurrences.