What special fate has been predicted for Mari djata as the son of sogolon

We have learned that Sundiata's mother, Sogolon Kedjou, whose marriage to Maghan Kon Fatta predicts the immortality of Mali through her baby. Sundiata was not able to walk until after his mother was ticked off when she asked for some baobab leaves from Maghan, whose own son picked the leaves from the baobab tree. When Sundiata learned what had happened from his tearful mother, he strapped two iron braces to his legs, and soon learned to walk.