The universal term for the lands scattered throughout the Vast is Isl (pronounced "eel"). Isls range in size from single small mountains inhabited by a single sapiant species to enormous continents housing dozens of races and cultures. The Vein flows around the edges of each Isl, providing a buffer against the infinite Vast. Pathways leading between Isls vary in size and speed; some are so treacherous that they are barely better than sailing through the Vast itself.