Trident

A trident is a three-pronged pole arm. It is used as a regular spear but has three points to triple the damage it would do to an opponent.

The trident was used by Ublaz Mad Eyes's special force, the trident rats in Pearls of Lutra. It was commonly used by toads through out the books. It was used by Ungatt Trunn in Lord Brocktree (book). And also by the Wearet (Kharanjul) of The Abyss in Loamhedge (book)