Yiga Clan Hideout is a location in The Legend of Zelda: Breath of the Wild. It is the hiding place of the Sheikah Yiga Clan located at Karusa Valley in the Gerudo Desert region of Hyrule. It serves as a mini-dungeon and the boss Master Kohga is battled there.
This is one of the stealth parts of Breath of the Wild. When Link enters the hideout, he is greeted with a few banners and torches. Link has to burn a certain banner in order to proceed onward to the next portion of the hideout. When Link enters the new area, he will come across an imprisoned Gerudo who warns Link about the Yiga Clan's security. He can either battle the Yiga Blademasters and Footsoldiers, or try to sneak past them.
If Link battles the Yiga, all of the members in the area followed by a couple of archers, will appear in front of him. When an archer is defeated, he will drop Mighty Bananas, and sometimes Rupees. If the big ones are defeated, Link can obtain their weapon, and sometimes Mighty Bananas.
If Link sneaks past them, he can equip a Sheikah armor for more efficiency. He can also use Mighty Bananas to distract and move by them. There are Treasure Chests littered around the hideout that contain rupees and stones.
Whenever Link accesses the final area of the hideout, he can use the Magnesis Rune on the Sheikah Slate on a certain spot on the wall in order to face off against Master Kohga, the boss of the Yiga Clan. After defeating him, Link obtain a treasure chest containing the Thunder Helm. However, the clan members will still attack Link throughout Hyrule.