Yan Xu is a veteran peak 2 lotus realm Saint of the Saint Race, the same level as the Myriad Ancestor Great Venerable. He possess the Tian Luo Chess Board which is a 2 lotus sacred treasure which ranked first in the all heaven 2 lotus sacred treasure ranking.
One of his Saint Pupil powers is called dragon beard, it creates a huge golden flame that resemble the beard of a dragon, the flame can burn even space as shown when he burned Zhou Yuan small worlds meteorites.
He was completely trapped by the last rune of the Heavenly Yuan Brush ( Tian Yuan World) before being refined in the Refining Saint Gourd.