How Do You Pronounce "Léak"?

First things first: it is not pronounced like the English word "leak."

Léak has two syllables: "lay-AHK" (/leˈak/). The first syllable rhymes with "day," and the second is a short, open "ahk," with a slight glottal catch at the end. Say "lay-ahk" quickly and you are close enough that a Balinese person will understand you.

What Is a Léak, Exactly?

A léak is not a species of monster. A léak is a human being who practices a specific branch of Balinese esoteric knowledge who is believed to be able to send their spirit out of their body at night, often in a transformed shape: a ball of fire, a monkey, a pig, a bird, or, in the most famous image, a disembodied head trailing its own glowing entrails.

In Balinese terms, this knowledge belongs to pangiwa, the "left path" (from kiwa, "left"), as opposed to panengen, the "right path" of healers and priests. Crucially, both paths draw on the same underlying science of sacred letters (akṣara), mantras, and ritual power. What differs is intent and direction. This is why Balinese thought resists a clean good-versus-evil reading: the left and the right are two halves of a single system, an expression of the principle the Balinese call rwa bhineda, the inseparable pairing of opposites.

The queen of the léak in the Balinese world is Rangda, the fanged, long-tongued widow-witch whose masked figure battles the protective lion-like Barong in temple performances. Their combat famously ends in a draw, not because the story is unfinished, but because in Balinese cosmology neither force can, or should, annihilate the other. The Rangda figure is rooted in the Javanese tale of Calon Arang, the widow of Girah, whose destructive magic was said to have ravaged the kingdom of King Airlangga in eleventh-century Java, and who is associated with the goddess Durgā.

Do Balinese People Still Believe in Léak Today?

Yes — though "belief" is too thin a word for it. For many Balinese, léak are simply part of how the world works, in the same register as germs or electricity: invisible, real, and dangerous if you are careless.

Contemporary léak belief shows up in everyday life in several ways. When someone falls ill suddenly, and especially when hospital treatment fails or the symptoms seem strange, families will often consult a balian (a traditional healer) alongside medical doctors, to determine whether the sickness has a sekala (visible, physical) or niskala (invisible, spiritual) cause. Nighttime sightings of drifting lights, called endih, are still reported and discussed. Newborn babies, considered spiritually vulnerable, are guarded with particular care, and people are careful about leaving hair clippings, nail trimmings, or photographs where they might be misused.

It is worth stressing that most Balinese do not spend their days in fear of witches. Léak belief functions less as terror and more as etiquette: a reason to maintain good relations with neighbors, complete one's ritual obligations, and stay humble about what one cannot see.

How Do the Balinese Protect Themselves From Léak?

Protection against invisible attack is a routine part of Balinese religious life, and it comes in layered forms: consecrated substances, worn objects, and recited formulas.

Balinese Hinduism is often called agama tirtha, "the religion of holy water." Tirtha — water consecrated by a priest through mantra — is sprinkled, sipped, and dabbed on the body at virtually every ceremony, and it is the first line of spiritual cleansing.

Less known to outsiders is the important role of holy oils. Balian and priests prepare blessed oils, typically coconut-based, empowered with mantras and sometimes with rerajahan, which are magical diagrams and sacred letters inscribed during the oil's preparation. The logic, as Balinese practitioners explain it, is practical: water is transient. It is received, used, and gone; its blessing is tied to the moment of the ritual. Oil, by contrast, is understood to store spiritual energy for far longer. A vial of consecrated oil can be kept in the house or carried on the body for months, applied to the forehead of a child before going out at night, or rubbed on someone believed to be under attack. Where tirtha purifies the moment, oil is a battery — protection you can keep in your pocket.

Magic Belts (Sabuk)

Among the most distinctive Balinese protective objects is the sabuk, a consecrated belt worn around the waist, usually hidden under clothing. These belts are prepared by a balian or priest and inscribed with rerajahan: potent drawings of deities, demonic guardians, and sacred syllables. The waist is considered a strategic point of the body. The belt encircles and seals the wearer's midsection, guarding the vital organs and the body's center of power. Sabuk are sought by people who feel targeted by witchcraft, but also by those whose work exposes them to spiritual risk: performers who dance sacred masks, healers, and, in older times, warriors.

Amulets and the Tridatu Thread

Balinese protective amulets take many forms. The most visible is the benang tridatu, the tricolor thread of red, black, and white worn around the wrist, its three strands representing the divine trinity of Brahmā, Viṣṇu, and Śiva — you will see it on the wrists of everyone from priests to schoolchildren to expat yoga teachers. More specialized amulets include small metal plates or rolled inscriptions bearing rerajahan, rings set with empowered stones, and miniature weapons. What makes an object an amulet is not its material but its consecration: it must be ritually "brought to life" and periodically maintained with offerings.

Mantras

Finally, there are mantras — recited formulas of protection. Some are pan-Hindu and public, such as the Gāyatrī mantra; others are Balinese kawisesan (power-knowledge) formulas transmitted privately from teacher to student, often invoking Śiva or fierce protective deities to armor the body. A person who feels a presence at night may recite a protective mantra, and children are sometimes taught short formulas the way Western children are taught bedtime prayers. Here again the mirror-logic of Balinese magic applies: the léak's power is built from mantras and sacred letters, and so is the defense against it. It is the same alphabet, written in opposite directions.

The Bigger Picture

The léak complex — witches, healers, holy water, oils, belts, threads, and mantras — is not a superstitious leftover at the edge of Balinese Hinduism. It sits close to the center of it. It expresses a worldview in which the visible and invisible interpenetrate, in which power is morally neutral until directed, and in which protection is not a one-time salvation but a discipline of daily maintenance. If you visit Bali and see a Barong-Rangda performance, remember that you are not watching good defeat evil. You are watching the Balinese universe hold itself in balance, which is, in the end, what all those oils, belts, and whispered mantras are for.