Ivory Rhones was a notable sage from Lindelt who seems primarily concerned with the preservation of life. Ivory Rhones created the Ring of Soul Protection. She held a teaching position in Lindelt, and we know that her students created the Ring of Life Protection, a less powerful but almost equally useful ring. The students were no-doubt inspired by Ivory's work, but it's also possible that Ivory was inspired by her students to create the superior ring.
It is likely that Lindelt was established by the survivors of Shulva. This would make sense because of the miracle Denial found in Shulva, which allows the caster to continue living for a time even after losing all their health. If this is the case, Ivory Rhones was likely continuing a trend that started in Shulva.
Theories go here.