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In The Legend of Zelda: Tears of the Kingdom, the Fierce Deity armor set and sword are legendary items that can be obtained after completing a series of related quests. Knowing the quests that are tied to finding the Fierce Deity set will make it easier for you to decide when to go after this armor set and as well as any important considerations to keep in mind.
This comprehensive guide lists all related quests to pursue and the exact process of obtaining the Fierce Deity Set, which consists of the Ember Trousers, Chest Armor, Boots, and Mask, as well as the powerful Fierce Deity Sword.
Beginning The Quest
To begin the first quest leading to obtaining the Fierce Deity set, head to the Foothill Stable located in the northeast of central Hyrule. There is a campfire nearby with rising smoke. Get to the campfire to find two brothers engaged in a discussion and speak with them to begin the "Misko's Cave of Chest" side quest. The quest requires you to explore a cave and unearth a treasure chest.
It is recommended to use a dog to make your search easier. Fortunately, you can find a nearby dog and befriend it by feeding seven food items like raw meat or apples. Once the dog has had enough food, it will start leading you to the nearby Cephala Lake Cave.
Finding The Ember Trousers
Follow the dog as it sniffs around the cave, eventually leading you to a specific location. Use your Ultra Hand ability to unearth the chest and open it to acquire the first piece of the Fierce Deity Set, the Ember Trousers. The brothers who gave you the quest will meet you again for another conversation. After the conversation, you will find a bottled message that you can read to learn about the Fierce Deity sword and three keys associated with the Fierce Deity form, which essentially is an armor set that you should wear to acquire the Fierce Deity sword. After you have read the bottled message, the Misko's Treasure: The Fierce Deity side quest will be added to your journal.
Acquiring The Fierce Deity Boots
To find the Fierce Deity boots, head to the Ancient Tree Stump located northwest of Hyrule Field Skyview Tower. Upon reaching the Ancient Tree Stump, descend into the caverns to discover the Ancient Tree Stump Cave. Once you touch the ground, look for a cave blocked by vines on the south side of the cavern.
Use a sword or fire to clear the vines and proceed into the cave to climb a pillared structure and some rocks to reach another vine-covered entrance. Once again, clear the vines using a sword or fire and unlock the chest to find the Fierce Deity boots. The Fierce Deity boots boost your attack damage.
Acquiring The Fierce Deity Armor
To obtain the Fierce Deity Armor, visit Akkala's Red Crowned Citadel, northeast of Central Hyrule. To reach the top of the Citadel, glide from Ulri Mountain Skyview Tower. When you reach the Citadel, start your armor hunting journey from the Domizuin Shrine and head to the west side of the ruins.
You will find a broken wall that can be climbed onto, and from there, head right to find a small hole in the wall. Duck to pass through the hole to enter an area with a hole on the floor that leads you to a treasure room. Drop into the treasure room and unlock the treasure chest to acquire the Fierce Deity Armor.
Acquiring The Fierce Deity Mask
The final piece of the Fierce Deity set is the Fierce Deity Mask. To obtain the final piece, head to the northeast edge of the map to a landmark called Skull Lake. Once you reach Skull Lake, look for a tall structure. You want to reach the top of the structure, and you can do so by gliding off of a cliff from the northeast of the spire.
After reaching the top of the spire, save your game before diving into the Left Eye of Skull Lake. Your dive will be broken by water at the bottom of the cavern.
Upon reaching the cavern, make your way through the cave and past the skeletal enemies to reach an entrance blocked by rocks. Use blunt weapons or bombs to clear the entrance to another large cavern with a mound. Climb the mound and open the treasure chest to acquire the Fierce Deity Mask.
Acquiring The Fierce Deity Sword
With the Fierce Deity Armor set acquired, it is now time to find the Fierce Deity Sword. To acquire the sword, return to Cephla Lake Cave where you will find a stone wall that slides open and reveals a treasure room. Enter the treasure room and open the treasure chest to collect the Fierce Deity Sword and complete the Misko's Treasure: The Fierce Deity quest.
While the Fierce Deity Sword is an excellent sword, it will eventually break. However, you won't have to worry about the armor set as it is unbreakable.