"Okay, so. This is liao." She dips a hand into a cloth pouch attached to her belt and pulls out a small glass vial containing a violently purple substance, and places the vial on the desk.
"It is refined from an extract of a plant called Vinum. The sap of Vinum gives dreamless sleep. The consumption of liao, instead, puts you in a kind of - waking sleep. You are placed in contact with your soul - with the seat of all fundamental human drives, which we call Virtues... or False Virtues - or Malign Spiritual Presences - if we dislike them.
From there, you can draw them forth. If you are untrained, liao will simply give you a strong feeling of connectedness to these underlying forces, and you will dream vividly next time you sleep.
With a little training, you can focus this connection to drive out presences that do not belong - ghosts, possessing spirits, unquiet dead of all kinds; to see such presences, and auras that lie upon things and people, and similar occurrences; to shape the dreams of those you share a dose with, and your own dreams; and to place a mark upon the soul, which takes the form of a couple of words that express something about that person - usually something you would like them to take with them into their next life.
With somewhat rarer training, it can be used to cut someone adrift from their connection to their soul - this is not done lightly, it is a crime punishable by death to do this to someone without a Writ of Excommunication from the Synod, but it does prevent them from bringing forth any auras of their own, and it can be used benignly to - re-seat the soul, after certain injuries to it - and can be used to reverse this effect.
Other uses require one to be Dedicated - this is a ceremony that anyone who is Dedicated can perform, which aligns your soul with a particular Virtue. Dedication can happen spontaneously with sufficiently great deeds in pursuit of a Virtue, but this is usually considered a Miracle and something that would be a sign of the Paragon; however, this is how dedications initially arise.
Once Dedicated, the connection may also be used to evoke auras - on a place, we call it Consecration; on a person, we call it Anointing; on an object, we call it Hallowing.
All of these things can be done by one who is truly connected to their soul without liao - that is the path of the Paragon, which we all seek to emulate and one day attain, be it this lifetime or several lifetimes hence.
Would you like me to explain True Liao, or take questions on what I have said so far?"