Baba Yaga
Vital statistics
Full name Baba Yaga
Born (?)
Died 14th century, Hogwarts Castle
Personal items Philosopher's Stone
In the canon
Wikia  •  Wikipedia

Baba Yaga was a very powerful dark witch who lived in the 14th century. She owned the Philosopher's Stone. She taught Battle Magic at Hogwarts for one year during which she was killed by Perenelle Flamel.