A warhammer with liquefying powers.
Forged from the stuff of legends by a great Sacre-Sorcerer. Grants the wielder a variety of different powers throughout the day and night.
Want to avoid fighter types focusing on swords? Make Longswords and Bastardswords the weapon of the Noble class, with a death penalty for other to carry. These weapons will be ornate and finally crafted. Adventurers will be stuck with cheaply made broad and shortswords, while professional fighters might use two handed swords.