thank you for sharing above info…in my understanding…magha nakshatra is related to pitri and retro saturn with ketu relates again to pitri so this makes this combination karmic…secondly merc+Venus+rahu in 8th aqua is again huge pending karma…also specify if it is in shatbisha or other 2 nakshatra falling under aqua…karma related to family tree regarding women mostly maternal side and also mercury relate death rituals and “murde ka phool” …Sir has taught vastly on this topic in previous videos in youtube very good sutras are covered by sir and also I myself tried them on charts and it worked accurately…so you can refer if you would want more detailed info…but consider mangal and guru position also… also in one of the sutras it relates to kuldevi …sir has spoken abt this combination and given remedies also…best of luck on your search…god bless…jai mahadev maa gauri…