Mercury gets debilitated when it is placed in the sign of Pisces, which means Mercury becomes very weak by virtue of its placement in the sign of Pisces. Accordingly debilitated Mercury in the eighth house of a horoscope may not produce significant positive or negative results for the native, unless it is supported by the other positive or negative planets in his horoscope. The type of results given by such debilitated Mercury whether they are positive or negative; depend on the working nature of Mercury and on the overall tone of the horoscope in question.
Benefic retrograde debilitated Mercury in the eighth house of a horoscope in the sign of Pisces can bless the native with good results related to marriage, profession, fame, authority and many other types of good results depending on the overall tone of his horoscope. Some natives under the good impact of such retrograde debilitated Mercury may receive its benefits through the field of their marriage due to which they may come across many types of favorable results by virtue of their marriages. Benefic retrograde debilitated Mercury in the eighth house in the sign of Pisces can bless some natives with life partners who may be rich and these natives may benefit through such marriages. For example, if benefic retrograde debilitated Mercury is placed in the eighth house of a horoscope in the sign of Pisces along with benefic exalted Venus, benefic Mars is placed in the seventh house of this horoscope in the sign of Aquarius and benefic Saturn is placed in the eleventh house of this horoscope in the sign of Gemini, the native may receive this benefit. The native boosted by benefic retrograde debilitated Mercury in the eighth house in the sign of Pisces and other benefic planets may get married to a woman who may have a very rich family and the native may profit through this marriage in many ways.
The good influence of retrograde debilitated Mercury in the eighth house in the sign of Pisces can bless the natives under its impact with success, fame and authority through many fields of profession, when favored by the right type of planets in the horoscopes of these natives. Some natives under the effect of such benefic retrograde debilitated Mercury may get blessed with creative abilities, they may engage in creative professions relevant to their abilities and they may achieve success as singers, actors, musicians, designers, writers, dancers and other such professionals. For example, if benefic retrograde debilitated Mercury is placed in the eighth house of a horoscope in the sign of Pisces, benefic Sun is also placed in the eighth house of this horoscope, benefic Mars is placed in the third house of this horoscope in the sign of Libra, benefic Rahu is placed in the twelfth house of this horoscope in the sign of Cancer and benefic Ketu is placed in the sixth house of this horoscope in the sign of Capricorn, the native may become a musician. The native boosted by benefic retrograde debilitated Mercury in the eighth house in the sign of Pisces and other benefic planets may possess good abilities related to the creation of music and he may engage in this field on professional basis. The joint impact of such benefic retrograde debilitated Mercury and other benefic planets may bless this native with good results as a music composer and he may earn significant amount of money and fame through the music created by him.
At the same time, if benefic Moon is placed in the third house of this horoscope in the sign of Libra along with benefic Mars; and benefic exalted Venus is placed in the eighth house of this horoscope in the sign of Pisces along with benefic retrograde debilitated Mercury and Sun, the equation may improve a lot. The native boosted by such benefic retrograde debilitated Mercury and other benefic planets may become a very successful musician and he may earn very good amount of money and fame through this field of profession. The joint impact of benefic retrograde debilitated Mercury in the eighth house in the sign of Pisces and other benefic planets can also bless this native with formal awards for some pieces of music created by him. Apart from this, benefic retrograde debilitated Mercury in the eighth house in the sign of Pisces can bless the natives with good results through many other fields of profession, when working in the company of profession building planets in the horoscopes of these natives.
On the other hand, malefic retrograde debilitated Mercury in the eighth house of a horoscope in the sign of Pisces can trouble the native with problems related to marriage, profession, health and many other types of problems depending on the overall tone of his horoscope. Such malefic retrograde debilitated Mercury can hit some natives in the field of their marriage due to which these natives may suffer from many types of problems before and after their marriages. Some natives suffering from such malefic retrograde debilitated Mercury may witness delay in their marriages and such delay may prolong with the addition of other negative planets to their horoscopes. In an extreme case of this type when supported by other malefic planets, malefic retrograde debilitated Mercury in the eighth house of a horoscope in the sign of Pisces can keep the native unmarried till his age of 48, or such native may not get married throughout his life.