Source: Bestiary 4, pg(s). 19
Blood hags, also called soucouyants or blood crones, are blood-thirsty monsters whose true form looks like an old woman whose skin has been completely removed. They average around six feet tall and weigh 120 pounds. During the day they masquerade as human women of advanced age who live on the edge of smaller communities. At night they reveal their true form and ambush their neighbors, experimenting, feasting, and bathing in their blood.
Changelings born to blood hags are known as blood-born changelings or veil mays, and are known for their incredible facility in blending in with and being accepted by their parent race. Unlike other changeling heritages, veil mays do not have heterochromatic (color-mismatched) eyes, instead developing increasingly bloodshot eyes as they grow older.
For additional resources, see the Meta page.