Blessed Qiraji Pugio

Blessed Qiraji Pugio is a one-handed dagger obtained by turning in Imperial Qiraji Armaments and 3 Elementium Ingots to Arygos within the Temple of Ahn'Qiraj. This dagger is one of four rewards to choose from.

Source
This item is a quest reward from Imperial Qiraji Armaments (quest).