kudos to you for real africa, vs hollywood africa. i have a systemless setting based on Bantu mythology and i had to do the research. one source you may not have considered is Google Scholar. i tried 'igbo magic' and now i know that igbo and bantu cultures share the archetype of the magical blacksmith.

Magic, Religion and Iron Technology in Precolonial North-Western Igboland

just jump through the hoops and they'll let you read it. yes, they think they own the information. so, what do you do for magical blacksmiths?

this is my stuff - feel free to use it any way you want. UbantuPDF