The Witch of Lynx Crag is a character in the Blood and Wine expansion for The Witcher 3: Wild Hunt. Not much is known about her. She lives in a small house at Lynx Crag with several panthers that are not aggressive against her.
She can be asked or threatened into helping to lift the curse on Daphne's Wraith. If she is asked, she'll ask Geralt for a lock of his hair, so Geralt cannot see her anymore in the future.