A Glaive is a Two-Handed weapon. It has a range of one tile and adds seven Weightpoints.
The Blacksmithing skill (8) can be used to craft Glaives next to a Forge. Two Board and two Ingots are needed. At shops they sell for 138 Gold, whereas Poison Glaives sell for 366 Gold. From Blacksmithing Level 16 onwards GM Glaives can be crafted with the same material, that have a longer durability than regular ones.