Nhatu is an oddity in that it is very easy to travel to, but it is very hard to leave. As such, the more planar savvy worlds use it as a sort of, prison. It was the great Wayfarer Daiba long ago that discovered this plane and its unique properties. She, being the master of artifice created The Scepters of Imprisonment, devices capable of transporting any being to the plane. These were originally given to only the greatest leaders and dearest friends of Daiba across the multiverse. Since then, they have found there way into varied hands.