The Blade of Eternal Darkness is a historic dagger in World of Warcraft, and in the Season of Discovery it's a common option for many caster classes.
Tips for Growing Blade of Eternal Darkness – SoD Phase 3 #Shorts
In the third phase of the Season of Discovery, the Blade of Eternal Darkness received a slight makeover from its usual Classic WoW appearance. An additional equip effect was added to the dagger that increases the power of damaging and healing spells, making it a clear best option for a variety of classes.
The Blade of Eternal Darkness is best suited to damage-focused spellcasters like Mages and Shadow Priests, though almost anyone who can wield daggers and/or cast spells will find value in this epic item.
Here's how to get the Blade of Eternal Darkness in WoW SoD phase three.