In The Emperor’s Soul and Elantris the magic systems have very different methods and powers, though both work through symbols. Assuming they adapted the symbols to their local geography could they use each other’s methods? Could an Elantrian forge a soulstamp say?
Birth in a certain location on Sel gives a certain affinity for the local symbols, and their usage. To use the magic of another region, one would need to have a rewritten connection to that area instead.
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