The Lost Language
Traces of aged runic script can be found all over the continent of Kycela. From faded carvings in stone to fragile parchment in lost places, it’s not uncommon for any given NPC to have seen a trace somewhere. However, there is currently no one in the world that can actually read it.
For simplicity and sanity it has 26 letters, and the lead scholars around the world all agree that they have found A E I O U and Y (all too common a vowel in fantasy words). That leaves 20 letters still missing. If a character has most or at least all of the complete alphabet, they could translate old writings that baffle our best scholars. Most of those learned sages agree that each of the twenty countries on the Kycelian continent secretly hide one letter – somewhere – each with fantastic magical powers. Who knows what could be achieved if the lost language were restored.