I know this has been touched on before, but I couldn't find a specific answer.

Eisenhorn's auto seance (which he also uses to talk to the spirit of a deceased murder victim in Regia OCculta) ability: is it presented in any game/book/supplement? If so which one. Thanks.

Pretty sure this is one of those things that Abnett basically made up himself, so it's not really in any of the Dark Heresy books, no.

Ive never read any specific rules for it, though it could potentially be part of a Psyniscience test.

@Tom Cruise

The funny thing is Dan made up a lot of things that are now canon and Eisenhorn in conjunction with the old Inquisitor game paved the way for what we have today