Midnight milk
A rare hallucinogen that showed Aldo something that had actually happened
A rare and habit-forming hallucinogen, semi-legal at best, that Dwayne produced from a hidden woodland cache along with a bag of catnip and a smoke. He took a swig himself (about half the flask) and handed the rest to Aldo.
What Aldo got was not a dream. He lived through the Peren slave-rebellion, seven hundred years gone, in a vision searing enough that the party spent the rest of the evening arguing about whether it could be trusted and whether more of the stuff was worth the risk of wanting it.
The flask was empty by the end of the night. Dwayne said he would ask a contact about getting more, probably out of Forven. There is a worse relative of it called sour milk, and nobody in the party has gone looking for that at all.