psychomancy
/ˈsʌɪkə(ʊ)ˌmansi/noun
Conjuration of, or communication with, the spirits or souls of the dead; necromancy.
Origin
Late 16th century; earliest use found in Robert Harrison (d. c1585), Brownist and writer. From psycho- + -mancy, in sense 1 after post-classical Latin psychomantia and its etymon Byzantine Greek ψυχομαντεία necromancy.