[K]

There is a special province that has a hero who is wearing these items. Finding it is just really good luck.

There are several neat "set" random provinces that have unique artifacts(like the Robe of the Sorceress and the Hammer of the Cyclops), powerful commanders that can be captured (an A7 comes to mind), or other wierdness(a Golem with a pile of statues or the above mentioned A7 with phantasmsl warriors).