Here are 5 reasons the Via Combusta was considered so evil, astrologers were advised not to read charts with these placements. Please remember that the fixed stars in this post are no longer within the Via Combusta from 15 degrees Libra to 15 degrees Scorpio.
Over time, the Fixed Stars have shifted and moved in the sky. There are also many malefic stars that were inside of the Via Combusta during ancient times, but they have since moved or access to their names and current positions have yet to be re-discovered by the general population.
1.     Fall of The Sun in Libra
a.     A fallen Sun is muted or expresses less directly, which creates different challenges. A fallen Sun nativity is entangled with other people in their lives. Avoids conflict and will be indecisive if there is no fairness or balance. More likely to compromise and accommodate others to maintain peace. Suppressing their own will and opinions. If the native is not truthful to themselves, they may experience inner chaos. Unique path of growth and wisdom. Ego is more mindful and less forceful. These natives are diplomatic, negotiators, and mediators. Learn to separate themselves from their relationships and opinions of others to build confidence and self-discovery. Naturally drawn to beauty, elegance, and glamour.
2.     Fall of The Moon in Scorpio
a.     A fallen Moon naturally flows into soft; flowing emotions intertwined with the intense, deep, and combative nature of Scorpio creating a challenging emotional landscape. Natives with a Fallen Moon can have feelings that are all-consuming and overwhelming. Tend to latch onto feelings rather than letting them go creating internal battles. Struggles with fear of vulnerability such as suspicion, secrecy, and defensiveness that protect their highly sensitive inner world. Emotional comfort is often found through psychological transformation, which can be unsettling. Profound emotional growth. Exceptional psychological insight and emotional intelligence. Not afraid to dive deep into their own psyche and can help others dive deep into their own feelings. Resilience, endurance, and transformation from confronting their own depths. From tears to wisdom. Knows what their body needs to heal.
3.     The Insufficient Price a.k.a. fixed star Zuben Elgenubi at 14 degrees Scorpio
a.     Indicates an immortal name or a name that will never be forgotten
b.    The nature of Mars with a small pinch of Saturn
c.     More noticeable in night sect
d.    If conjunct The Sun or Moon, indicates bad health
e.     If conjunct Saturn or Neptune, indicates disadvantageous for the native, including conjunctions to Jupiter, The Greater Benefic
f.       If conjunct The Ascendant, indicates a rise in fortune followed by a downfall
g.     Danger in relation to water
h.     If challenging aspects to Mars, Saturn, or The Moon then justice will take a back seat to vengeance – advised not to go into a profession where one can use their power or they will regret it in public dishonor or worse
i.       The native must keep their head and heart clear, otherwise the native may experience domestic strife or even death from a psychopathic killing from their spouse
j.       Known to cause malevolence, obstruction, unforgiving character, violence, disease, lying, crime, disgrace, and danger of poisoning
4.     The Full Price a.k.a. fixed star Zuben Eschamali at 18 degrees Scorpio
a.     Indicates an immortal name or a name that will never be forgotten
b.    The nature of Jupiter and Mercury per Ptolemy, but later considered the nature of Mars sextile Jupiter by 20th century astrologer Alvidas
c.     Indicates extremes of what a mind can achieve for good or for bad
d.    Indicates sharpness of mind and intellect. Powerful psychic qualities or psychotic qualities if there are harsh placements interacting with it.
e.     Aspects to the Midheaven, Imum Coeli, Ascendant, or well placed chart points indicate assistance with honor and distinction
f.       Aspects to Mercury indicate studiousness
g.     If well placed, it will inspire spiritual and mental forces
h.     If conjunct The Sun, The Moon, or Jupiter then the native may be successful as a civil servant, lawyer, or scientist
5.     Heart of the Serpent a.k.a. fixed star Unukalhai at 22 degrees Scorpio
a.     Should only be used in conjunction with negative charts
b.    The nature of Saturn and Mars
c.     Indicates immorality, accidents, violence, danger of poison, criminal inclinations, bold and shameless attitude, and revolting
d.    Indicates a rise followed by a fall from favor
e.     Indicates chronic diseases that are not easily detected resulting in a weakened state of health and necessary operations
f.       If aspects to Uranus or Neptune, then the native will be accident prone
g.     Aspects to Neptune will make the native prone to infectious disease or poisoning
h.     If aspects to the Midheaven or Imum Coeli or conjunct Malefics (Saturn/Mars), then it can indicate damage to a social position
i.       Indicates difficulties in professional life
j.       Affects mines and minerals in a native's life
k.     Should only be used in conjunction with a chart that is negative or full of hard aspects
References
·        Fixed Stars and Constellations in Astrology, Vivian E. Robson, 1923
·        Fixed Stars and Their Interpretation, Elsbeth Ebertin, 1971
·        The Living Stars, Dr. Eric Morse, 1988
·        Fixed Stars and Judicial Astrology, George Noonan, 1990
·        The Fixed Star Health and Behavior Imbalance, Ted George and Barbara Parker, 1985
·        The Power of the Fixed Stars, Joseph E. Rigor, 1979
·        A Dictionary of Modern Star Names, Kunitzch, Smart, 2006