The blue answers your questions.Dalamar said:"What do you know of the yuan-ti?
"We are uncertain of how many there are. As far as the Greater Council has told us, there are several hundred. The number of the more humanoid yuan-ti - those that you will be dealing with - number a little over one hundred."How many? Who's their leader?
"No, you will not be receiving any aid from the Council, other than that of transportation. It is assumed that you can handle any and all obstacles that you will encounter, if you encounter any at all."Also, will we be getting other escorts than the astral constructs that take us there?
"Every 24 hours, the carriages create a psionic effect that manifests the astral constructs with the metapsionic 'persistent' modification. The new constructs replace the old as the old fade out. The carriages themselves are actually psionic items, developed by a shaper in the service of the Greater Council."And out of personal interest, how do you make them [the astral constructs] last so long?"
"Really, I need to meet this shaper some time. I find astral constructs highly fascinating, and would love to hear tips from a master.""The carriages themselves are actually psionic items, developed by a shaper in the service of the Greater Council."
Dalamar said:"Will the carriages work even though we have both a technologist and a sorcerer among us? I believe their auras would interfere with the psionic effect."
Jarval said:"I've heard talk that the yuan-ti possess some kind of psionic artifact. Do you know anything about this? Might it be part of the Psionicle?"
Zhure said:"Will that be safe, them reforming every day? We'll have to land to rest at night, right?"
Sollir Furryfoot said:"Does the Yuan-ti possess any technology?"

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.