Union with the Deceased
Scholars have said that if one dreams that a known deceased person united with them, it is interpreted as receiving benefit from that deceased person's knowledge or wealth.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.