This page explains how to find the Daka Tuss shrine and solve the "Sunken Scoop" puzzle.
How to Reach the Shrine
Warp to the Ta'loh Naeg Shrine in Kakariko Village, then walk northwest. You should be able to see the Daka Tuss shrine in the distance. Float there from Ta'loh Naeg Shrine.
How to Solve the Daka Tuss Shrine
There are three puzzle orbs floating on the water. Look in the water and you will see a metal scoop. Use Magnesis to carefully lift it upward (tilt the right control stick). Lift the scoop so it is under a puzzle orb. Then slowly move the bowl above the caged area beside the water, then move it downward inside of the cage so that the side of the bowl pushes against one of the cage walls so that the bowl tilts sideways, dropping the puzzle orb into the target below. Once the orb is in the target, the gate in the wall will open.
Use Magnesis to move the metal bowl into the new area. Scoop up a puzzle orb and make it land on top of the cage beside the water (just jiggle the scoop around until the orb falls out). This cage is closed on top, so just put the orb on top. Then drop the scoop into the water so that it lands on the large button.
When the orb is in the second target, the water will drain. It also drains from the first pool, so go back to the first area and go down into the place where the water used to be. Go through the hole in the wall and open the chest to get a Silver Longsword.
Then go to the second area and go down into where the water used to be. Go through the hole in the wall, then go up the ramps to reach Daka Tuss and get the Spirit Orb.