A world after the breaking
The Great Decoherence
The Grand Monochord once represented a single, sustaining harmony. When it shattered during the Great Decoherence, the relationship between language, meaning, and material existence fractured with it. The world did not simply become dangerous; it became dependent upon maintenance.
A mountain may still stand and a fire may still burn, but neither can be taken entirely for granted. The people of Threl preserve what remains through work, memory, ritual, and the careful use of the Word.
The world has not ended. It has become a thing that must be kept.