Thrice-Wrought Halberd

 is a unique halberd found in the Cabal of Wind Temple in Enmerkar Forest. It deals no physical damage, but does frost and fire damage.

Description
"Artifact forged Long ago by a female blacksmith for a Gold Lich she loved"

Acquired From
is located in the Cabal of Wind Temple. Defeating all enemies in the Temple will open a chamber below the entrance, which was originally cut off by a barrier. The will be found in this newly opened area, sticking into the ground next to an Ornate Chest.

A trick to killing all the Shell Horrors is by leading them to the middle chamber, trapping them by closing the doors, and then flipping a switch on the second floor which triggers a blast mechanism.