The main objective of this quest is to relight the torches situated inside the Ancestor’s Cave of Rest. The rewards for completing this quest include the Holmill Echo and a Golden Egg.
How to Complete the Ancestor’s Cave of Rest Rift Main Quest
To begin, Zelda must travel to the far northern region of the Gerudo Desert and enter the Ancestor’s Cave of Rest. Inside the cave, she should use the Bind ability to move a large boulder located on the left side, which will reveal a hidden doorway. Passing through this door leads to an area inhabited by Holmill enemies. Zelda needs to defeat these creatures to obtain the Holmill Echo. In the same area, another large boulder can be moved using Bind, uncovering a ladder that leads to a lower level.
On this lower level, which features soft sand, Zelda can utilize the Holmill Echo to create a hole in the sand. By creating a hole in the farthest left section of the sand, she will drop down to a treasure chest containing a valuable Golden Egg. After collecting the egg, Zelda can climb back up to the main chamber. Here, she will find two unlit braziers near a grave. Using the Ignizol Echo, she must light both of these braziers to complete the puzzle and the quest.