The Hammer of Kai is very similar to a weapon named the Lucerne Hammer from 15th and 16th century Europe. The Lucerne
Hammer was a polearm weapon which proved to be extremely effective at dismounting riders and smashing through armor.
Named the Lucerne Hammer because vast numbers of the weapon were found stored in the armory at Lucerne, Switzerland,
the weapon was wood-hafted with a metal head. Similar to the poleax and warhammer in design, the Lucerne Hammer was fitted
with a four-pronged hammer head rather than a simple hammerhead or blade. Not particularly useful for slashing, the Lucerne
Hammer was excellent for thrusting, smashing, and ripping open armor (even against a mounted opponent).