'You don't step into the ring with Ali because you think you can box.
The Clan is the original unit of social organization for the people of The Known World. Humanti society is becoming more diverse. The Guild or professional organization is taking the fore in the Known World. Except on the Sea.
What if casting magic changed (for a few hours or days depending on the strength of the spell) the colour of the skin of the spellcaster? It could lead sadly to a very racist world to rp in.