When is it apparent that Sundiata is a powerful man of magic and enchantment?

Although Sundiata is successful in his battles, he cannot harm the sorcerer king because the latter has magical protections. Sundiata turns to magic for help, and through sacrifice is able to craft a magical arrow. In their largest battle, Sundiata nicks Soumaoro with the arrow and the sorcerer king loses his power. Soumaoro retreats and escapes. This feat proves that he is a powerful man of magic and enchantment.