Kullean Tuning Prism is a unique prism used when transmuting gear through the Horadric Cube, shaping the outcome of item modifications in a more powerful way.
It adds a random bonus Legendary affix to the final result, giving the item an extra layer of strength compared to standard transmutations.
Unlike other prisms, it does not lock the item after use, so it can still be improved or modified further later on when you need to do this.
Where To Get Kullean Tuning Prism?
Kullean Tuning Prisms can drop from War Plans rewards through Cube Spoils, but at a lower rate than most other tuning prisms.
Tree of Whispers caches are another source, especially during regular Grim Favor turn-ins while farming endgame content.
Elite enemies across Sanctuary can also drop them, though the chance is rare, so most players will only see them occasionally while playing normally.
Kullean Tuning Prism Uses
Kullean Tuning Prisms are added when transmuting items through the Horadric Cube to push the result beyond its normal outcome.
They are typically used on gear that already fits your build, especially pieces where an extra Legendary affix can noticeably improve performance.
Because the item remains editable afterward, it’s often used when you still plan to refine or upgrade the gear later instead of locking it in place.
Item Types & Affixes
Kullean Tuning Prism can be used on gear that already rolls affixes through the Horadric Cube transmutation system in an attempt to improve them even further.
The bonus Legendary affix that gets added depends on the item slot and the affix pool available for that piece of gear and if you are lucky, you will get the one you want..
Since it does not lock the item, it is often used on endgame equipment that still has room for further improvements.
Verdict
This prism sits in a different category from most others because it adds power without taking away future flexibility.
It becomes most valuable when used on already strong gear that you intend to keep for a long time, especially when an extra Legendary affix pushes it into endgame quality.
Since it is much rarer than standard prisms, most players end up holding onto it until a perfect item shows up rather than using it immediately.
