The Gidbinn

From Diablo Wiki

An ancient blade of the old Skatsimi religion, the blade holds powerful magic. It is retrieved in the quest Blade of the Old Religion in Act III and used to reinforce the warding spell that protects the Kurast Docks.

The Gidbinn can be used as a Dagger class weapon:

The Gidbinn
Dagger
One-Hand Damage: 3-7
Durability: 30 of 30
Required Dexterity: 25
Required Strength: 15
Dagger Class - Very Fast Attack Speed

List of Unique Daggers
Normal Daggers — Gull (Dagger) • The Diggler (Dirk) • The Jade Tan Do (Kris) • Spectral Shard (Blade) Exceptional Daggers — Spineripper (Poignard) • Heart Carver (Rondel) • Blackbog's Sharp (Cinquedeas) • Stormspike (Stiletto) Elite Daggers — Wizardspike (Bone Knife) • Fleshripper (Fanged Knife) • Ghostflame (Legend Spike) Quest Items — The Gidbinn