What are Cửu Tinh and Bát Thần in Kỳ Môn Độn Giáp?
Cửu Tinh are the nine stars of the heaven plate in Kỳ Môn Độn Giáp: Thiên Bồng, Thiên Nhuế, Thiên Xung, Thiên Phụ, Thiên Cầm, Thiên Tâm, Thiên Trụ, Thiên Nhậm, Thiên Anh. Bát Thần are the eight accompanying spirits used to determine fortune and misfortune: Trực Phù, Đằng Xà, Thái Âm, Lục Hợp, Bạch Hổ, Huyền Vũ, Cửu Địa, Cửu Thiên. Together with the earth plate, heaven plate, gates, and kỳ nghi, these two layers form a complete Kỳ Môn chart.
One must distinguish two senses of the word "thần" in Kỳ Môn. The first is Bát Thần, the eight symbolic spirits above. The second is "thần" as a state of qi, as in "âm thần" referring to the spirit layer placed by earthly branch. This article discusses the first sense, Bát Thần.
What are the nine stars and their home palaces?
According to Kỳ Môn Chỉ Quy, part 2, the order of the nine stars when setting up a chart is recorded in a mnemonic verse. For dương độn it starts from Thiên Bồng as the first, then Thiên Nhuế, Thiên Xung, Thiên Phụ, Thiên Cầm, Thiên Tâm, Thiên Trụ, Thiên Nhậm, Thiên Anh. For âm độn it is reversed, starting from Thiên Anh as the first, then Thiên Nhậm, Thiên Trụ, Thiên Tâm, Thiên Cầm, Thiên Phụ, Thiên Xung, Thiên Nhuế, and finally Thiên Bồng.
Each star is tied to a home palace on the Lạc Thư board and to an element, giving it its own quality. The table below summarizes the common presentation in Kỳ Môn texts.
| Star | Home palace | Element | Suggested quality |
|---|---|---|---|
| Thiên Bồng | Khảm 1 | Water | Theft, hidden gain, water calamity |
| Thiên Nhuế | Khôn 2 | Earth | Illness, disputes, quarrels |
| Thiên Xung | Chấn 3 | Wood | Movement, clash, relocation, struggle |
| Thiên Phụ | Tốn 4 | Wood | Documents, study, blessing, benefactor |
| Thiên Cầm | Center 5 | Earth | Writing, medicine, animals, holding ground |
| Thiên Tâm | Càn 6 | Metal | Medicine, strategy, illness, remedies |
| Thiên Trụ | Đoài 7 | Metal | Litigation, quarrels, support |
| Thiên Nhậm | Cấn 8 | Earth | Birth, dwelling, stability |
| Thiên Anh | Ly 9 | Fire | Fire, civilization, alarm, ritual |
The assignment of elements to stars is not fully agreed among books. Most follow the element of the home palace, but some emphasize the star's seasonal qi, called vượng tướng hưu tù. Kỳ Môn Chỉ Quy, part 33, sets out how to assess seasonal qi for gates, and this method also applies to stars: in season is vượng, being generated is tướng, generating outward is hưu, being controlled is tù, controlling outward is phế. The same star in a different season has different strength.
Which spirits make up Bát Thần and what does each govern?
According to Kỳ Môn Chỉ Quy, part 34, the eight spirits can be used to divine objects and events by form and quality. Trực Phù belongs to Lục Giáp, is a noble green spirit, and governs precious objects and money. Đằng Xà governs ugly, abnormal, illusory things. Thái Âm governs documents, stored items, feathered flying creatures. Lục Hợp governs paired or joined objects, things linked above and below. Bạch Hổ governs violent objects, things that wound, or iron and stone. Cửu Địa governs old, dim, unclear things. Cửu Thiên governs weapons, active objects, things with sound or glittering light.
The anthology Tuyển tập bài viết Tam Thức chọn lọc số 3 also mentions these spirits when reading the Bản Mệnh palace, for example if Bản Mệnh meets Cửu Thiên the person has broad thinking and far vision, while meeting Huyền Vũ suggests a tendency to deceit and malice. This reading shows Bát Thần carries symbolic meaning, not purely physical meaning.
Why does the order of Bát Thần differ between dương độn and âm độn?
This is the most important point and also the easiest to confuse. The book ki mon don giap dieu bi records two orders. Dương độn follows the order: first Trực Phù, second Đằng Xà, third Thái Âm, fourth Lục Hợp, fifth Câu Trần, sixth Chu Tước, seventh Cửu Địa, eighth Cửu Thiên. Âm độn follows the order: first Trực Phù, second Cửu Thiên, third Cửu Địa, fourth Chu Tước, fifth Câu Trần, sixth Lục Hợp, seventh Thái Âm, eighth Đằng Xà.
The book Thuật số Lạc Thư Kỳ Môn Độn Giáp Nguyên Thủy also records the âm độn spirit ring in a similar way: Trực Phù, Cửu Thiên, Cửu Địa, Huyền Vũ in place of Chu Tước, Bạch Hổ in place of Câu Trần, Lục Hợp, Thái Âm, Đằng Xà. The two books thus agree on order, differing only in the names of the two spirits in the middle of the ring.
The principle is that âm độn runs opposite to dương độn, so the order of placing spirits is also reversed. Kỳ Môn Chỉ Quy, part 2, uses a mnemonic verse to state this: in dương độn, Thiên Bồng begins and the stars go forward; in âm độn, Thiên Bồng and Thiên Anh swap places and the stars go backward. By the same logic, Bát Thần also reverses direction.
Why do schools use different spirit names?
This is where books do not agree, and the reader needs to know it to avoid confusion when consulting sources.
The book ki mon don giap dieu bi records that dương độn uses Câu Trần and Chu Tước, and adds a note that Chu Tước has Huyền Vũ below it and Câu Trần has Bạch Hổ below it. Thuật số Lạc Thư Kỳ Môn Độn Giáp Nguyên Thủy records that the âm độn ring uses Huyền Vũ in place of Chu Tước and Bạch Hổ in place of Câu Trần. Kỳ Môn Chỉ Quy, part 34, when divining objects uses both Bạch Hổ and Huyền Vũ, and both Cửu Địa and Cửu Thiên.
One can picture it as follows: there is a system using the pair Câu Trần and Chu Tước, a system using the pair Bạch Hổ and Huyền Vũ, and a system mixing them according to âm or dương độn. Tuyển tập bài viết Tam Thức chọn lọc số 3, when listing the spirits, writes "Cửu Thiên, Câu Trần, Châu Tước, Huyền Võ, Bạch Hổ, Lục Hợp, Thái Âm, Đằng Xà", that is, it merges all four names together.
So when reading a Kỳ Môn chart, the first step is to determine which system the text follows. If it follows the old system using Câu Trần and Chu Tước, the two middle spirits are Câu Trần and Chu Tước. If it follows the system using Bạch Hổ and Huyền Vũ, the two middle spirits are Bạch Hổ and Huyền Vũ. This is not a contradiction in essence, but a difference in transmission and naming.
How are Bát Thần placed alongside Cửu Tinh in a chart?
Thuật số Lạc Thư Kỳ Môn Độn Giáp Nguyên Thủy, part 75, shows how to place Bát Thần tied to stars and sử. For example, for the hour Ất Sửu, the book records each pair of stars with their sử and accompanying tướng, such as Thiên Cầm and Thiên Bồng carrying Sử Khai with Thái Âm, Thiên Xung carrying Sử Đổ with Câu Trận, Thiên Tâm and Thiên Anh carrying Sử Kinh with Đằng Xà, and so on for the other pairs. The book also notes a special case: when the Trực Phù star pair moves down to the Center palace, it absolutely does not carry Sử Trung, so it is brought outside, and the Trực Phù tướng still holds an outer palace, and cannot usurp the king's seat. Conversely, if the Trực Phù star pair is not directly in the Center palace but carries Sử Trung, it still enters the Center palace, and the vacated palace is filled by the star pair that was in the Center palace but carries a different sử.
This is an important technical detail, because it shows Bát Thần are not placed independently but placed by star and by sử, that is, by a predetermined order. Kỳ Môn Chỉ Quy, part 33, also speaks of "dương tương" and "âm thần", where dương tương takes the eight Trực Phù tướng and adds them to the heaven plate by the first Lục Giáp cycle, while âm thần takes the eight Trực Phù tướng and adds them to the heaven plate by the Trực Sử palace. The hour stem is dương so the tướng on the stem is dương tương, the hour branch is âm so the tướng on the branch is âm thần. The two sides combine to judge fortune and misfortune, and can turn fortune into misfortune or misfortune into fortune. If the tướng on the stem is good and the tướng on the branch is also good, then it is entirely fortunate. If the tướng on the stem is bad but the tướng on the branch is good, it can still be saved. If the tướng on the stem is good but the tướng on the branch is bad, the bad is hard to save.
How do you read Cửu Tinh and Bát Thần in practice?
Kỳ Môn Chỉ Quy, part 13, records a specific chart reading: âm tam cục, day Kỷ Mão hour Bính Dần, Trị Phù sits in the Center palace, with Mậu over Bính called the Thanh Long hồi thủ pattern, and the earth plate again holds the Cửu Địa spirit, so it is an entirely auspicious sign. Trị Sử sits in Khảm, is a thief, the palace is controlled by us, the earth plate holds Canh, and Thiên Bạch Hổ together with Thương Môn flies in, so the sign of an unfavorable thief is clear. In addition, Bính, Trị Phù flies in hidden, over the earth Canh forming the Huỳnh nhập Bạch pattern, and the book cites a classic saying "huỳnh nhập bạch hề tặc tức khứ", judging that the great army has just arrived and will pacify.
This example shows the reading method: do not read a star alone, do not read a spirit alone, but read them in clusters. Trực Phù meeting Thanh Long hồi thủ is auspicious, but if at the same time Trị Sử meets Bạch Hổ and Thương Môn, the bad still clearly appears in another direction. This is also why Kỳ Môn Chỉ Quy, part 33, stresses checking both âm thần and the residual qi of the gate, because star, nghi, gate, and tướng meeting misfortune is not necessarily misfortune, and both layers must be examined to decide.
What should you note when consulting sources?
First, do not confuse Cửu Tinh with Cửu Cung or Lạc Thư. Cửu Tinh are the nine stars, while Cửu Cung are the nine squares on the board. Each star has a home palace, but when setting a chart the star can fly to another palace.
Second, do not confuse Bát Thần with Bát Môn. Bát Môn are Hưu, Sinh, Thương, Đổ, Cảnh, Tử, Kinh, Khai, the gate layer. Bát Thần is the spirit layer. The two layers are independent but often read together.
Third, differences in Bát Thần naming between schools are normal. The book ki mon don giap dieu bi clearly records that dương độn uses Câu Trần and Chu Tước, and âm độn uses Huyền Vũ in place of Chu Tước and Bạch Hổ in place of Câu Trần. Thuật số Lạc Thư Kỳ Môn Độn Giáp Nguyên Thủy follows the same direction. But Kỳ Môn Chỉ Quy, part 34, uses all four names when divining objects. Students should follow one consistent system in one chart, avoiding mixing.
Fourth, do not assert results absolutely. Kỳ Môn is a symbolic system for reasoning, not a tool for certain prediction. The same chart, read by different people, can give different results depending on lineage and on the context of the question.
