Season 15 of Diablo 4 has brought back the familiar endgame grind, and two materials sit right at the top of every player's shopping list: Kullean Tuning Prisms and Scattered Prisms. Both are gatekeepers to true best in slot gear, and both have been notoriously stingy for many players this season. After Blizzard's recent hot fix addressed some of the drop rate issues, farming routes have shifted, and knowing exactly where to go can save you hours of frustration. In this guide, we update the new best methods for farming prisms quickly in Diablo 4 Season 15.
Diablo 4 Season 15 Best Kullean Tuning Prism & Scattered Prism Farm Guide
Kullean Tuning Prisms are the material used to transfigure an extra legendary aspect onto your amulet, and they have been the single biggest bottleneck for players chasing best in slot amulets this season. Because you often need around 30 attempts on average to hit the aspect you want, players have been burning through them faster than they can be gathered. Up until the recent hot fix, the Kurast Undercity bargain for Kullean Prisms was bugged and returned almost nothing, but that has since been fixed and the drop rate is now the strongest it has been all season.
Scattered Prisms, on the other hand, are used to add sockets to gear, and they remain one of the more inconsistent resources in the game. Community feedback across Reddit shows Season 15 is a bit better than Lord of Hatred was, but many players still find themselves progression restricted behind them, especially when trying to socket up their full endgame kit.
So now let's get into the exact farming routes for each material. Btw, if you don't have much to grind, go check the best deal for Diablo 4 Season 15 items for sale at AOEAH.COM!
Where & How To Farm Kullean Tuning Prisms in Diablo 4 Season 15
The Kurast Undercity is now firmly the top farm for Kullean Tuning Prisms after the recent patch. Everything below revolves around setting up the correct tribute, the right bargain, and the right war plan nodes.
1. Kurast Undercity with Tribute of Ingenuity (Best Method)
This is by far the most rewarding source per run after the hot fix.
Step 1: Get Tributes of Ingenuity
The material you need to slot into the Corrupted Shrine at the start of a Kurast Undercity run is the Tribute of Ingenuity, which is a Greater Herodrick cube materials tribute.
There are two main ways to stock up on them:
Nephalem Dungeons with the altar scroll wheel trick. Activating an altar multiple times causes it to drop loot repeatedly and summon extra elites and Butcher spawns, giving you a fast pipeline of tributes.
Crafting them at the Enchanter. All undercity tributes can be crafted using the same dust that dungeon sigils and infernal compasses use. Magic tier can be amalgamated 5:1 into rare, rare into legendary, and only Greater Tributes of Arman can push further into mythic. You can also salvage any legendary tributes you don't care about (like Greater Talismans) or salvage your Infernal Horde keys into dust to fuel this loop.
Step 2: Select the Right Bargain
Once inside the Undercity, plug in a Legendary Tribute of Ingenuity and select the bargain that grants Kullean Tuning Prisms. The bargain costs 50 million gold per run, which sounds steep, but it pays for itself quickly once you see the return.
Step 3: Set Up Your War Plan
Head into your war plan and go down the left track of the dungeon tree. The node you absolutely want is Gutter Filth, which gives every beacon in the Undercity a chance to spawn a portal prankster. A portal prankster is a goblin that, once killed, drops a bonus chest containing the same rewards as your chosen tribute. In this case, that means more Kullean Tuning Prisms on top of your main chest.
Additional points further down the tree let your portal pranksters drop tribute chests after the boss, which you can then open with any spare tributes for even more loot.
Step 4: Run the Undercity Correctly
During the run, do not sprint straight to the boss. Instead:
Click every single brazier and beacon on the way through, since each one has a chance to roll another prankster.
Clear out any prankster goblins that spawn before finishing the run.
Kill the boss at the end to open the main tribute chest plus any prankster bonus chests.
Drop Rate Expectations
Based on tested runs post hot fix, you can expect roughly the following returns:
A clean single run with no pranksters: 13 to 16 prisms
A run with one prankster: around 22 prisms
A run with multiple pranksters: 30 to 39 prisms, with some testers reporting stacks pushing past 50 across two back to back runs
The exact number scales with torment level, and results at Torment 10 and below will be a bit lower than at Torment 11 or 12. Some players at Torment 11 have still reported inconsistent results with only 1 prism from a full run, so expect some variance even after the fix.
2. Nightmare Dungeons & Escalation Nightmare Dungeons with the Materials Affix
For a lower cost alternative that doesn't require burning tributes or gold, run Nightmare Dungeons or Escalation Nightmare Dungeons that roll the materials affix on the sigil. Nightmare dungeons with a materials focused affix have a chance to drop Kullean Tuning Prisms directly, and Escalation Nightmare Dungeons are especially good because they double as a strong gold and Murmuring Obol farm at the same time.
To force this affix to appear more often, put three war plan points into the dungeon tree and pick the node that gives you a choice between three portals on each stage between Escalation Nightmare Dungeon floors. That way you can pick materials rolls consistently.
3. Blood Maiden in Helltides
Community reports show the Blood Maiden event during Helltides has been dropping Kullean Tuning Prisms this season as well. Some players have reported roughly 4 out of 5 Blood Maiden completions yielding at least one prism, which makes this a solid side objective while you are already Helltide farming for other materials like Baneful Hearts and Aberrant Cinders. Drop them into the Blood Altar with a full stack of hearts, tag as much damage as possible on the Maiden, and check the loot pile when she dies.
Where & How To Farm Scattered Prisms in Diablo 4 Season 15
Scattered Prisms are more scattered by nature (no pun intended) since there is no single dominant farm. Instead, several sources stack up to give you a steady supply. Here are the reliable methods the Season 15 community has settled on.
1. World Bosses
World Bosses are one of the most consistent sources in the game. Every world boss kill drops at least one Scattered Prism, so make sure to hop on the world boss timer any time one is up. The 3 hour gap between spawns is the main downside, but the drop is guaranteed.
2. Augment Caches from the Mercenary Bartering Vendor
The mercenary bartering vendor sells Augment Caches for only 100 coins each, which is extremely cheap. Each cache has a chance to contain Scattered Prisms. Community reports vary, with some players saying every second cache drops one, and others saying they have opened many with no drops, so treat this as a volume play rather than a guaranteed source.
3. Gem Fragments Chest After Infernal Hordes
After finishing an Infernal Hordes run, the Gem Fragments chest at the end tends to reward around 4 to 5 Scattered Prisms per opening, depending on how much Aether you spent. This is one of the most reliable per hour sources in the game right now since Infernal Hordes are quick and repeatable.
4. Lair Bosses at Higher Torments
Lair bosses drop Scattered Prisms fairly often, especially at higher torment tiers. Players running lair bosses at Torment 3 and above have reported stacks of around 10 prisms just from a normal farming session, which makes them a strong second option alongside Infernal Hordes.
5. Blood Maiden in Helltides
The Blood Maiden event during Helltides has been dropping Scattered Prisms this season as well, with some players reporting around 4 out of 5 Blood Maiden completions rewarding at least one. This is a solid side objective while you are already in Helltide farming other materials.
Which Method to Prioritize
If your goal is pure throughput, stack Infernal Hordes for Gem Fragments chests, hit every World Boss timer, and spend spare mercenary coins on Augment Caches whenever you swing by the vendor. Toss in lair bosses and Blood Maiden events during downtime, and you should have enough Scattered Prisms to socket a full build within a few play sessions.
Season 15 has finally put both Kullean Tuning Prisms and Scattered Prisms in a much healthier spot after the recent hot fix. The Kurast Undercity with a Legendary Tribute of Ingenuity and the Gutter Filth war plan node is now the runaway top pick for Kullean farming, while Scattered Prisms are best gathered from a mix of World Bosses, Augment Caches, Infernal Hordes Gem Fragments chests, and lair bosses. Stack them up, transfigure those best in slot amulets, socket your gear properly, and you will be ready to push Uber Tristram and the hell difficulty capstone dungeons in no time.