The witches coven are making a potion and ethel, glinda, locasta and circe each add a different ingredient?
The witches coven are making a potion and ethel, glinda, locasta and circe each add a different ingredient. When the potion is finished, there is 1 / 4 of the bat blood left, 1 / 3 of the knotgrass, 1 / 2 of the moonstone and 5 / 8 of the unicorn hair. Ethel used the most. Glinda used the least. Locasta used more than circe. Who used the moonstone? , ? .