The Shadow Hag is a Poe-like creature who has the ability to transform into shadows. It begins the battle by splitting into four shadows which encircle the room, harming Link on contact. Eventually the shadows converge into one and numerous Moths arise from it, which Link can defeat for Hearts and Mystical Seeds. While Link deals with the Moths, the Shadow Hag emerges from the shadow to charge at him, but will dive back into the shadow if Link sees it coming. To hurt the Shadow Hag, Link must face away from it and use the Seed Shooter to fire a Seed that rebounds off a wall and hits the Boss as it charges. After taking enough damage, the Shadow Hag will be defeated, leaving behind a Heart Container and opening the door to the Echoing Howl.
The Shadow Hag greatly resembles Joelle, one of the four Poe Sisters in Ocarina of Time and Majora's Mask.