Dean Marcellus has made it clear that as a specialist in postconjunctive species I am to provide you with all the help necessary in preparing for the trip you are planning. Maybe I will start with a warning: it's pure madness. Assuming that you survive teleportation -- and opening a stable portal several dozen meters above the ground is, as you know, highly risky -- you will then be torn to shreds. As much as Vampires Superiores are actually rational creatures with developed cognitive and analytical functions, other species may be less open to attempts to make contact.
If by chance you do live to have an audience with this Unseen Elder, do the following immediately: genuflect, say words of greeting in their language -- "eclthi, lautni ama" -- and place on the ground the attached Haakland aragonite crystal as a gift. Then, and only then, is there the slightest chance that you will be heard. But, by the gods, speak quickly and don't waste your words.