Ashes of war: Holy ground (Elden Ring)

Actually a subject, who found this ashes? As far as I know, he creates a healing zone, in one stupid guide it is written that it falls from the guardian of the tree, that golden knight that you can find at the beginning of the game. But I killed him and there is no ashes. There is also a theory that you need to kill him with the class of the prophet and then he will fall out. Has anyone dealt with him?