According to an Indonesian legend, Jenglot was an ascetic who wanted to learn the "Ilmu Batara Karang" or the way to eternal life. He was a hermit who worships demons to attain mystical powers and ability. 

Ilmu Batara Karang originated in Tasikmalaya City, West Java, Indonesia, before the time of islam. It is an occult practice in Javanese and Sudanese culture which is believed to provide immunity and strength to its owner, that practice still pervades to modern times though.  The owner of Ilmu Karang is believed to be able to melt or melt his opponent with just one touch. Apart from providing immunity, Ilmu Karang is also said to bring longevity or even immortality to its owner. They say if a person with great supernatural power meditates in a certain cave, they'll become a Jenglot. In other retellings of the legend, it is said that the earth itself rejects the corpse of a deceased Illmu Karang practitioner and that shrivelled corpse becomes the Jenglot.

If you want to use it to bring you wealth, you must perform a ritual that involves an offering (sajen) and place money in front of it. Let it see the object that you desire. For other purposes like revenge or causing harm to a person all you need is a picture of the person you want the Jenglot to cause harm to.

​The Jenglot is known to have other spiritual properties such as:

• To help extract otherworldly items like mystical stones, rings and kris etc.
• To have the jinns fear you as if you are their 'king'
• At times used to make love potions or love spells
• To counter any black magic attacks by your enemies/rivals

An occult practitioner trained in specific crafts is able to bind a jenglot to his will, but such a burden is not one that comes with a price. Once you possess a Jenglot you have to abide by an 'agreement' between you and the Jenglot. 

• To denounce your religious faith,beliefs and practices
• Perform meditation
• Offer blood sacrifices

It is common for Jenglot owners to feed them with animal blood or even offer it a sacrifice. Should you fail to do so, the Jenglot will harm you and your loved ones and it is said that they will tie your soul, preventing you from going over to the next life.

A Jenglot also has two different genders. For male practitioners will attain female Jenglot while female practitioners will attain male Jenglot. Jenglots can also come in different forms. While most of them are humanoid in appearances, there are those with half fish and half snake features. In Islam, it is believed that Jenglots are actually malevolent djinns that has taken this form so that it could be physically seen or touched by humans. 

In some retelling of Jenglot experiences, it is said that bathing a a jenglot in blood will cause it to animate. Others say that the jenglat does not animate but when you put a glass of blood near it, the blood would appear to drain away as if someone is drinking it. Some say the jenglot comes alive and consumes the blood when it is alone.

According to Muhammad Syakir Muhammad Azmi, a Malaysian Islamic medical practitioner, the jenglot may be made from ordinary materials. The price at which these objects are sold depends on how real they look, though they are generally inexpensive. On the other hand, the object may also be made using animal fetuses. Jenglots made from this material are believed to be more efficacious, and therefore would fetch a much higher price on the market. As of the time of this writing, you can find five Jenglots on sale at eBay ranging from SGD 150 - 450 dollars. ​

Sixth place: Grey Ghosts
These are the ghosts who line up to reincarnate, and they are the most commonly seen.
Chance of meeting: The Grey ghosts don't want to see you. If you meet one, it's purely coincidence and these spirits are actually quite harmless. They are wandering around waiting for their time.

Fifth place: White
These are the new souls, formed by people who have just died. They are generally not harmful and are more confused about their new state of being.
Chance of meeting: If you are down on your luck or happen to be in an area where a death had just taken place. This spirit is not likely to disturb you. 

Fourth place: Yellow
The cause of death of the deceased is related financial issues. For example, people who commit suicide due to bankruptcy or money woes are likely to come back as yellow spirits upon death. 
Chance of meeting: People who are troubled by money or material life problems would likely see these ghosts. They are mostly restless and can affect your mood.

Third place: Black
Black ghosts are usually made by people who have died due to sickness or depression. The exude a depressive aura and are blamed for causing accidents. Some believe that these spirits cannot reincarnate and are trying to find unfortunate victims to take over their place.
Chance of meeting: People with illnesses or feeling depressed have a higher chance of seeing black spirits.

Second place: Red
It is said that people who died tragically without justice or by taking their own lives due to emotional problems will become vengeful spirits. In Asia, there's a common misconception that committing suicide while dressed in red or burying the deceased in red will definitely bring the spirit of the soul of the dead back as a vengeful spirit. The colour of the burial outfit is less relevant than the intensity of the grievance.
Chance of meeting: People who are facing relationship problems, feeling emotionally unstable, or just experiencing a spate of bad luck.

First place: Green
The green ghost is an occasional feature in Asian ghost stories. They are usually depicted by a spirit that can absorb the living's energy, take over their body, and are not anchored to a single place. These spirits can haunt you even in the day and have the ability to move objects. 
Chance of meeting: People who have done many bad things, those that have harmed others, will be particularly susceptible to meeting such ghosts. It's easier to take over someone who has already very low self control.