The Legend of Zelda: Breath of the Wild/Great Plateau Tower/Shrines

Oman Au Shrine
Examine the pedestal to get the Magnesis rune. Use it to pick up one or both of the metal slabs and then enter the hole. Pick up the free metallic block or the one in the wall and push the other blocks aside. A Guardian Scout is waiting behind the wall. If you push a metallic block to the maximum distance and swing it side to side, you can kill the guard before it sees you. Be sure to grab anything it drops. Walk over the next metal slab, then move it to the next gap. On the left is a chest. Pull it over and open it to get the Traveler's Bow. Pull on the doors to get through to the end. Examine the glowing symbol to complete the shrine.
 * Name: The Magnesis Trial
 * Location: Northeast corner, across the large pond from the tower.
 * Extra Rewards: Magnesis Rune, Traveler's Bow
 * Enemies: 1