Tantalum is a rare, blue-grey metal that is found deep within the chasms of Ferchiun*. Immune to all but the strongest acids, if more had heard of it would be more sought after. It is nearly as hard as adamantine and holds an edge equally as well. Those few who believed such a tale did not return from their quest to gather any, or if they did, it was not to the homes from which they came.
These creatures are foul things that prey on the weakness of loss. Their home society, and indeed, their home, in completely unknown, as all that have been found have been killed to out standards.
The PC's enter a town amid a giant celebration, the Spring Wedding Festival. Unmarried men and women from all over the provinces gather her every spring to be matched by the most sacred matchmaker ever to live, Holly Lovard. Holly is now ancient and must be carried everywhere she visits and rumors are that this will be her last visit to the Wedding Festival so any matches made this spring will be doubley blessed.
Enter PC's, wrong place at the wrong time. Molly sees one of them, calls him/her out of the crowd and that are unable to resist the push and pull of the mob. Brought in front of Molly Lovard, the PC is declared the lifemate of
Could be the king's daughter, a peasant, member of the thieves guild. Could be anything to add a twist to an already building plot, or just throw the characters into an awkward situation.