Faced with the need to locate strange things in a strange city, Borgrim grabs someone scholarly looking, frowns at him like violence is not to be ruled out, and asks:

Scholarly person! Tell me immediately where to find black pearls and/or lotus blossoms in this town! It's of vital importance.

Spoiler: OOC

So ... every test is really an Intimidate test =D
Intimidate: (1d20+3)[15]

And I restate my suggestion that Intimidate be Strength based =)