Every four Spirit Orbs can be traded in at Prayer Altars, which are found across Hyrule, with an easily accessible one found at Kakariko Village, just near the entrance into Impa’s building. You earn one Spirit Orb each shrine and four each Divine Beast. To obtain heart containers you’ll need to collect Spirit Orbs, which are earned after completing Shrines and Divine Beast trials. In order to draw the Master Sword you need 13 Hearts, which means you need to collect 10 extra heart containers on top of the 3 you begin with. Then, the Master Sword is found in a stone near the Great Deku Tree. To reach Korok Forest, you’ll first need to complete the Lost Woods journey. The Master Sword is found in Korok Forest and is only obtainable once you have a certain amount of heart containers.
