1e
Slumbering Tsar campaign. Player party has learned that the ancient abandoned city of Tsar is home to a bunch of rival factions of evil dwellers, struggling like spiders in a barrel.

Party is discussing the use Contact Entity III which they have gained as a scroll of randomly generated loot.
>an open invitation to make contact and establish communication
to try and lure any Flying Polyps
https://www.d20pfsrd.com/bestiary/monster-listings/aberrations/flying-polyp/
that may be in range to go visit that abandoned city, in hopes that the monster will slaughter some of its denizens. They plan to sneak into the city, cast the spell, which should guide any polyps around to that location, and sneak out.

The PCs are average level 11. City is above their level so this is a rather dangerous mission for them to just get in and out.

I honestly don't know how to even play this out if they do this. Random 1d20 roll, on a 20 there just happens to be one of these very rare monsters within 200 miles? Should that be a 1d100 instead?
> Int 19, Wis 20, Cha 21
>Knowledge (history) +22, Knowledge (nature) +22
Than another random roll to see it actually goes there?
>The primary exception to this, to the detriment of other creatures unfortunate enough to dwell in regions
claimed by flying polyps, is war. Flying polyps excel at genocide, using their mastery over wind to scour clean entire cities and civilizations when they come upon them.
The inhabitants of that city aren't friendly to anyone, the polyp is described likewise and also crazy alien.
I have no idea how to roleplay 'alien' + that stat line
What do?