[@Undine], so I can't have a character rediscovering a family heritage of sandbending their parents may have hidden from them and they discovered due to being more of an Aang than a Toph? That's what I mean when I say "talented". Naturally predisposed towards a particular application of earthbending. It's fairly unbelievable that every earthbender is good at all the same things. They may all have the same range of abilities, but personality (dropping the bloodline) may make the character suited to sandbending.

Say they decided to try sandbending after class in the earthbender academy, after hearing or reading about it from somebody or in a book. They discover that's easier for them than the earthbending they're being taught. Is that impossible in this RPG?