The Shrine is located on Death Mountain.
The Death Caldera Crystal
This Shrine Quest, The Death Caldera Crystal, involves retrieving a Sky Crystal from a nearby cave. Upon activating the shrine, a beam will appear that points into Death Mountain itself. Heading northwest a short distance reveals a cave entrance blocked by blue boulders. Inside the cave is a short minecart track leading to the crystal, which serves as the weak point of an Igneo Talus. Defeating the Talus allows the crystal to be taken back to the shrine, completing the quest. The shrine itself is a Rauru's Blessing shrine, posing no additional challenge. The Flamebreaker Set is required for this quest, as is either Splash Fruit or Ice Fruit.