Rod of Seven Parts

Eons ago, a great war was waged between the Wind Dukes of Aaqa (the guardians of Law) and the Queen of Chaos. Those polar forces each craved the annihilation of the other, and were so obsessed with enforcing their ideologies that they spared no thought for Good and Evil. For many years the balance of power shifted back and forth, and neither side could achieve the upper hand.
Then the Queen of Chaos found and appointed a new commander: Miska the Wolf-Spider, who was so brutal and terrible to behold that the Queen also took him for her consort. With the arrival of the evil Miska, the forces of Chaos were bolstered and the Wind Dukes began to fear eventual defeat.
Therefore, they left the Captains of Law to hold the line while they combined all of their powers and created a magnificent ebony rod. With the newly created artifact in hand, the Wind Dukes rejoined the war at the battle of Pesh. The Dukes gave the Rod to the Captains of Law and bade them vanquish Chaos.
A fearsome battle raged for weeks, and the advantage shifted repeatedly between the foes. Finally, the Captains of Law surrounded the Wolf-Spider, and before the legions of Chaos could swarm to their leader's side, the Rod was driven through Miska's body. For a moment, every soldier stood terrified by the horrible scream of the general. Miska's foul blood covered the Rod and penetrated it as he writhed on the ground, and the magical forces of Law that had been infused into the Rod were combined with the essence of Chaos in Miska's blood, which ruptured the Rod and shattered it into seven pieces. Meanwhile, the Wolf-Spider was cast through a planar rip created by the explosion, and he remains lost on an unknown plane.
The Queen's soldiers converged upon the site in an attempt to capture the parts of the Rod, but the Wind Dukes intervened and magically scattered the pieces across the world.
Ever since that time, agents of the Queen have been ordered to seek out the Rod at any cost. It is rumored that if she regains all the parts, she can use the reconstructed Rod to find the Wolf-Spider and return him to her side, whereupon the wars will begin anew.
The Rod of Seven Parts is a 5-foot-long black, unadorned pole, broken into pieces measuring 4, 5, 6, 8, 10, 12, and 15 inches in length. The parts fit together in order of ascending length; the 4-inch tip (which resembles a short wand) is the thinnest part, the 15-inch head is the widest, and the rest of the pieces broaden steadily from the tip to the head.
The following information has been assembled from the appearances of the seven parts throughout history. Most is hearsay, but some consistent themes are relevant.
It's said that anyone who find one of the seven parts can sense where the next part can be found. Although most of the stories definitively say that the bearer can sense the next largest part, a few accounts say that the bearer can also sense the next smallest part. If the part being sensed is on another plane, the bearer knows which plane it is located on, and has a sense of the nearest portal to that plane. This sense diminishes the closer the bearer is to the next piece, past a mile, the bearer can point in the direction of the next piece, closer than that, the sense fails and the bearer must use mundane means to locate their quarry.
If a bearer has two parts and wishes to join them, they must draw the correct glyphs on each of the pieces. The glyphs act as the "glue", and the two joined pieces merge into one. No seams exist to show the separate parts. No known copies or representations of the correct glyphs exist. They would have to be researched by the bearer. If the bearer attempts to join two parts out of order, both parts magically scatter, though some stories say the pieces don't range far, within a hundred miles.
Each of the seven parts has its own spell-like effect which can be evoked by the bearer. In addition, joining the parts grants more effects. A consistency in the lore says that two parts together allows the bearer to cast the fly spell. Joining them in the correct order four-inch to five inch and so on, unveils even more power.
A consistent downside to bearing the parts is an increased penchant for order and logic. They say even holding one part of the seven, bearers cannot abide disorder and will become fastidious. The influence of the rod increases the more parts carried.