Letter of Introduction
The Letter of Introduction is a quest item found in Oracle of Ages. This item is obtained from a friend of the Graceful Goron in exchange for the Lava Juice, but only after Link obtains the Old Mermaid Key. Once Link takes this letter to the first generation of Graceful Gorons, he will be asked to perform the Goron Dance. If successfully completed, he will obtain the Mermaid Key, which is required to enter Mermaid's Cave in the Past.