Travelers

The Travelers are a nomadic tribe of the Xahir gifted with ancient and powerful music that they use to heal rifts in time. They guard the Traveler's Song a composition so powerful it can alter the flow of time and even rewrite history.
They mostly keep to the far edges of the Rim, but occasionally must intervene in the inner system to heal anomalies in time. They faced a crisis when a former member of their tribe, Ezra, played the Traveler's Song in the Orphean to win a contest and his composer friend Lorian used it to rewrite history entirely. With the Party and Ezra's help, they were able to fix the situation and restore history, more or less, to its original state.