Athame

Athames are almost completely identical to daggers, even using the dagger weapon skill. However, athames do not stack and more importantly, athames are exceptionally suited for engraving with. Any non-cursed athame will not dull from engraving, (although any athame that has an enchantment of -3 or lower is too dull to engrave with, regardless of blessed/uncursed/cursed status) and athames engrave at up to 10 letters per turn rather than 1 letter per turn. They are useful for writing messages and, if your version has it compiled in, engraving "Elbereth."

Athames are rarer than daggers, as they are never randomly generated. However, the first gift that a wizard receives from his/her god is always Magicbane, a neutrally-aligned artifact athame. (Other classes may also receive Magicbane, but it is not guaranteed to be the first gift that they receive)