True Calling

You can construct a perfect shade of any soul in existence, on any plane, living or dead. This shade is an exact copy of the target, except that it is entirely immaterial. It has perfect recall of all information known to it, and perfect recognition of such information. This shade is compelled only to exist, and is not required to cooperate any further. While summoned, no other version of this shade can exist anywhere else via usage of this spell or any effect replicating it. 

The caster is able to ask whatever questions they wish, and as long as the shade is cooperative, will provide an answer to the best of their ability. While summoned, the shade is unable to be harmed or coerced by the caster or anyone else, and doing so can potentially cause the spell to fail, with the harm transferred to the caster directly(i.e. punching your dead dad in the face would only result in punching the caster). 

The shade cannot leave the spot where it was summoned, but can perceive the world around them. If the shade is summoned from a living creature, it will only have information that it possessed at the time that the shade was constructed. As the shade is not actually the person being summoned, but a perfect recollection of their knowledge, there is no way to use this spell to communicate with the target.