I have a party of 5 level 14 PCs consiting of a Ranger, 2 Barbarians, a Magus, and a Wizard. This was my fist time even playing a game of Pathfinder much less DMing one so the PCs are rather powerful. So I want to throw a problem at them that they cant just stab to death or solve with the casting of a single spell. So I've put together an encouter where the party is being targeted by level 20 Ninja with all of the extra special abilities of a Master Spy. It will infiltrate their kingdom, impersinate their high ranking members of governmnt, steal, harass, attempt to kill their favorite NPC's, and overall just be a nuisance untill it stops playing around and begins to trying and actually murder them. It's the whole it could be anyone or anywhere thing, cant trust ayone, general paranoia, that sort of thing. Do you think she will be to hard to catch or deal with? If so how could I make her weaker without making it too easy? Or if you can think of a simple way to sovle the problem that I should plan for, that would be much appreciated aswell. Thanks guys.