Rapscallion Sword

The Rapscallion sword is carried by the Firstblade, or leader of the Rapscallion army. One side is wavy, to convey the oceans, the other is flat, to convey land. The sword is thrown into the air and depending on which side it lands on dictates which way the army goes.

Gormad Tunn, original Firstblade, favored sailing, so he rigged the sword with a brass clip so that it always fell on the wavy side.

Damug Warfang, Tunn's son and successor, favored land travelling, so he rigged the sword in a similar fashion so that it fell on the flat side.

Books
The sword appears in The Long Patrol.