The soucouyant or soucriant in Dominica, Trinidadian and Guadeloupean folklore (also known as Ole-Higue or Loogaroo elsewhere in the Caribbean), is a kind of blood-sucking hag
The soucouyant is a shape-shifting Caribbean folklore character who appears as a reclusive old woman by day. By night, she strips off her wrinkled skin and puts it in a mortar. In her true form, as a fireball she flies across the dark sky in search of a victim. The soucouyant can enters the home of her victim through any sized hole like cracks, crevices and keyholes.
Soucouyants suck people's blood from their arms, legs and soft parts while they sleep leaving blue-black marks on the body in the morning
If the soucouyant draws too much blood, it is believed that the victim will either die and become a soucouyant or perish entirely, leaving her killer to assume her skin. The soucouyant practices witchcraft, voodoo, and black magic. Soucouyants trade their victims' blood for evil powers with Bazil, the demon who resides in the silk cotton tree.
To expose a soucouyant, one should heap rice around the house or at the village cross roads as the creature will be obligated to gather every grain, grain by grain (a herculean task to do before dawn) so that she can be caught in the act.
To destroy her, coarse salt must be placed in the mortar containing her skin so she perishes, unable to put the skin back on. Belief in soucouyants is still preserved to an extent in some Caribbean islands, including Dominica, St. Lucia, Haiti, Suriname and Trinidad
The skin of the soucouyant is considered valuable, and is used when practicing black magic.