The Onisa Isles are an archiapelago stradling the Tastston and Drucallin Oceans. The fabled ancient home of the Githyanki as well as various mariner groups of other races, the Onisa Isles currently remain a lawless and dangerous region.
There are a few settlements on various isles throughout the region but these settlements are often heavily fortified and autonomous, living off the limited resources of the islands and the sea. Many built these fortifications and settlements as shipwrecked crews and fleeing fugitives.
The Onisa Isles consist of over three thousand individual islands, ranging from minor tips of sea mountains just above sea level and only covering a few meters, to the largest of the islands, Nor Aear.