Yes, SinVraal (and all the other Gargoyles) told me that i should reach out for the shrine of Singularity. But sadly it's unreachable, as you must be able to fly to enter the shrine.
Question:
Who tells me that i have to build a balloon?
Problem
It's totally obvious that i should try to get the magic carpet from Lord British! I have no clue why i should try to get a balloon?! Who gives me the clue to build such an air vessel!? i'm totally stuck.
Note
i am aware that i have to ask around in britain for a balloonist, once i have a clue about that – namely ask Isabella in Minoc or ask Selganor, also located in Minoc. still totally puzzled that i should not use the magic carpet.
Best Answer
You already found the one that should give you a clue about asking in Minoc.
This is the full dialogue tree for Sin'Vraal
Notice that there is a second trail that you could follow, but that would require you to listen by chance to a specific song from an NPC in Buccaneer's Den.
He mentions a balloon in one of his songs and will direct you to a book if you ask him about that. In the end the book will still point you to Minoc.
So, right now, your most natural option is to just ask the Gargoyle about what he meant by "intelligent" .