Eshos Shrine is on the mountain overlooking Dueling Peaks Stable.
Shrine Location
Eshos Shrine is at 1565, -1945, 0157, on the mountain overlooking Dueling Peaks Stable.
Combat Training: Shields
To the left of the base of the stairs, you will find several shields if you don't have any. To solve this shrine, you need to use Perfect Guard to deflect the enemy's projectiles. No other attacks will work. Press the indicated buttons to do this. You can press + and go to the System Menu and choose Special Controls to review the instructions.
For the fireballs, be sure to equip a metal shield, and for the electric orbs, be sure to equip a wooden shield.
After both Constructs are defeated, take the items that they drop, and go through the door that opened. Open the chest to get a random Zonaite Shield.
Go to the end of the shrine, and check on the glowing object to get a Light of Blessing.