Endest Silann was once a formidable High Mage on Moon's Spawn. By the time the Tiste Andii relocated to Black Coral, he was aged and considered himself to be "a barely competent castellan to the New Andiian Palace". He was among the oldest of the Tiste Andii, second only to Anomander Rake.
It was revealed that Silann's efforts had made it possible for Rake to protect the Moon's Spawn Tiste Andii by hiding the skykeep in the depths of Ortnal's Cut prior to the Siege of Coral. It was the magnitude of this work that depleted his powers.
He fled Kharkanas after Draconus returned to Mother Dark with the Terondai that opened the Gate of Kurald Galain. He found himself on the road north where he met Anomander Rake and the two continued on to the home of Andarist that was now a barrow for House Enes. There, Endest bled over the grave of Enesdia and revealed that Mother Dark had posthumously named her High Priestess of Dark.