In Echoes of Wisdom, the Great Fairy needs your help. And, in order to be the most stylish person in Hyrule, there's no way you can turn her down.
This guide covers how to complete The Great Fairy's Request, including where to find this late-game quest, where to get the Floral Seashell and the Magma Stone, and what you get from the Great Fairy.
Where to find The Great Fairy's Request Side Quest
The Great Fairy's Request is located in the Great Fairy Shrine in the middle of Lake Hylia.
At any point after you've cleared Eldin Volcano and once you've maxed out your Accessory Slots, visit the Fairy Shrine and you'll spy a treasure chest in front of the fountain. Open it for a Might Crystal, and the Great Fairy will appear.
She'll tell you that she knows how to make an item that makes finding Might Crystals much easier, but she wants a piece of well-crafted jewellery in return. She will tell you of a Gerudo woman who is known for her skills, and you'll be given The Great Fairy's Request Side Quest