Vistani

It has been rumored that Vistani possess a powerful wanderlust, and cannot stay within a mile of a given point for more than a week before suffering being afflicted with an illness resembling the flu or a fever.

When this occurs, the Vistani has between 2 and 7 days to cross the necessary ground or permanently lose all of their mystical powers, becoming an outcast known as a mortu, which translates roughly as “Living Dead.” This mechanic ensures that contact with helpful Vistani will occur only when the Dungeon Master wishes.

Vistani

D&D 5th: Ravenloft RikCameron