Donnacanto

This weapon is a heavy spear with a rowan wood shaft fitted with a brilliant silver head. It functions as a demilance. According to legend, the voice of Myrmidia is channelled through Donnacanto, the weapon singing like a divine choir when its wielder charges into battle.

Source

 * : Warhammer Fantasy RPG 2nd Ed -- The Thousand Thrones
 * : pg. 175