Corpse vision

A corpse vision was a dark-side Force power, akin to invoke spirits, conjured through Sith magic by a Sith sorcerer, that summoned the spirits of deceased Dark Lords while playing upon the Force sense of Force-sensitives to produce mind-tricking visions. Under the Sith practitioner's spell, the corpses would metamorphose into intimate images from the Force-sensitive's past that would whisper twisted, potentially damaging messages to the recipient.

Text and facts from the “Corpse vision” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.