Convert a Set Item in Kanai’s Cube

Kanai’s Cube in Adventure Mode, using Skill of Nilfur, the Convert Set Item recipe.

Before you go

Open your set inventory and identify a duplicate piece you can safely spend.
Check which missing slot belongs to the same set.
Collect Forgotten Souls by salvaging unwanted legendary or set items and Death’s Breath from Nephalem Rift elites.
Place the duplicate set item and the required materials into Kanai’s Cube.
Select Skill of Nilfur and transmute the ingredients.
Inspect the returned piece to see whether it fills the missing slot.
If it does not, decide whether another duplicate and material cost justify another attempt.

Keep an equipped copy and any rare slot variants out of the Cube; the recipe consumes its input.
Use this to complete a set, not to chase Ancient quality, because the output cannot be Ancient.

Repeat as materials and duplicate pieces allow. Each conversion produces a random piece from the same set, and there is no fixed number of attempts.

Using a piece from the wrong set: output stays within the input item’s set. Confirm the set before transmuting.
Converting your only useful copy: keep the item needed for your current build and spend a spare.
Expecting an Ancient result: this recipe cannot create Ancient items. Switch to other drops or reforging for quality upgrades.

Stop when the missing set slot is filled or when remaining duplicates are more valuable to keep; pursue ordinary gear drops for Ancient upgrades.

Sources & fact checks

Open a guide to find other locations and see what the item is used for.

Legendary and set gear

The Skill of Nilfur recipe can turn a duplicate set piece into another piece from its set, helping complete a build without…