Aspect of Efficiency – Diablo 4 Legendary Aspect

Aspect of Efficiency is a Sorcerer Resource Aspect that can be found by completing the Domhainne Tunnels Dungeon as well as from random enemy drops. After clearing the Dungeon for the first time the Aspect will be available in your Codex of Power.

How to Obtain - Codex of Power - Domhainne Tunnels

Aspect of Efficiency Mechanics

Legendary Aspects can change the way skills and builds work in significant ways.