How to get and upgrade Yiga Mask in Zelda: Tears of the Kingdom (TotK). Includes the location and upgrade materials of Yiga Mask, the effect, and the bonuses.
Equip Yiga Armor to increase Stealth up to 3 levels; the higher the level, the better stealth you get. Equip the full set and you will be able to enter the Yiga Clan Hideout and they won't become hostile. In addition, upgrade all parts twice to speed up your movement during the night.
Upgrade Materials
Level
Def.
Material
Level 1
3
Octorok Eyeball x2
Level 2
5
Fire-Breath Lizalfos Tail x3 Puffshroom x3
Level 3
7
Ice-Breath Lizalfos Tail x5 Keese Eyeball x5
Level 4
12
Electric Lizalfos Tail x5 x3 Mighty Bananas x10
Armor Of The Same Set
Where To Get Yiga Mask
Get From The Mountain Hut On The East Of Mount Hylia
Map
Visual
When you try to enter the hut, that is located under the cliff on the east side of Mount Hylia, you will be in battle with the Yiga Clan. After you defeat it then you can enter the hut and speak to the woman and receive the Yiga Mask. Mount Hylia is located east of Gerudo Canyon Skyview Tower.
Get All Of The Series, Then You Can Enter Yiga Clan Hideout
When you wear the entire series of the Yiga Clan equipment, then you can enter the Yiga Clan Hideout. When you complete the challenge then you will receive the "Lightning Helm" which will make it ineffective to Lightning.
How To Get Yiga Mask Back
Available At Cece's Shop In Hateno Village
Rupees Cost
4000
Yiga Mask can be re-purchased at Cece's Armor Shop in Hateno Village. To buy it, you need to complete the Cece-related Side Adventures, so if you haven't done so yet, finish that first.