Diablo 4 S15 Season of Hell's Legacy: Runes Gear and Crafting Materials Guide

Diablo 4 Season 15, Season of Hell's Legacy, adds Legacy Uniques, Soul Splinters, expanded Mythic crafting, and Affix Value Reroll. The challenge is no longer simply finding more loot - it is knowing which Runes, materials, and gear bases are worth keeping before you salvage them.

This guide focuses on the drops that deserve a place in your stash, from Runes and Resplendent Sparks to Legacy Uniques, Soul Splinters, and Ancestral gear. Use the keep-or-salvage rules below to make faster decisions while leveling and farming Torment.

Runes — Save Them for Mythic Crafting or Runewords

Runes remain important for Runewords, but Season 15 also gives them another use through Jeweler Rune Crafting for Mythic Uniques.

At the Jeweler, you can select an equipment slot and use the recipe's required Runes, Resplendent Sparks, and Gold to roll a random class-appropriate Mythic Unique for that slot. Because each recipe requires specific Runes, it is worth checking the recipe before spending duplicates.

For the first part of the season:

• Keep Runes until you know whether you need them for a Mythic recipe or an active Runeword.
• Check the Jeweler recipe first and save the specific Runes required for your target slot.
• Socket Runewords freely on temporary gear only when the setup helps your current farming build.
• Avoid spending valuable Runes on gear that you expect to replace shortly.

Verdict: Runes are not automatic salvage material in Season 15. Keep them flexible until you have decided between an active Runeword and a Mythic crafting route.

Resplendent Sparks, Keys, and Boss Materials — Spend Them at the Right Time

Resplendent Sparks are among the most valuable materials for Mythic crafting, so spending them simply because you have enough for a recipe can create a poor long-term upgrade.

Before using Sparks, decide which crafting route fits your current gear:

• Horadric Cube: Use this route when you already have a strong Unique and want to turn your investment toward a specific Mythic crafting path.
• Jeweler Rune Crafting: Useful when you have the required Runes and want to target a Mythic by equipment slot.
• Blacksmith Mythic Cache: Provides a broader random Mythic option when you are willing to give up slot targeting.

Lair Boss Keys and Stygian Stones are better treated as targeted farming resources. Save them for bosses your build can already clear efficiently, especially when you are farming a specific Unique or Mythic-related drop pool.

Verdict: Keep Sparks until your Mythic route is defined, and use boss materials when your build is ready to farm them efficiently rather than while you are still replacing core gear.

Legacy Uniques — Compare Them With Your Current Build

Season 15 introduces nine Legacy Uniques that remain available in both Seasonal and Eternal play. They are still Uniques rather than a separate item tier, so the Legacy label alone is not a reason to keep every copy.

Instead, compare each drop with the item currently occupying that slot.

Worth Checking for Farming Builds

• Stone of Jordan — useful for builds that benefit from its elemental damage and resistance effects.
• In-Geom — particularly relevant to cooldown-focused farming setups that can maintain frequent Elite kills.
• Nemesis Bracers — useful for builds that actively benefit from Shrine encounters.
• The Furnace — worth testing on builds that make strong use of a two-handed weapon for Elite or boss damage.

Build-Dependent

• Leoric's Crown — valuable when its effects fit a build using the relevant Jewelry/Soul Splinter interaction.
• Squirt's Blouse — better suited to builds that can maintain its offensive benefits without losing too much survivability.
• Arioc's Needle — mainly worth keeping when its effects support a build built around Deadly Strike.
• Henri's Perquisition — evaluate it according to whether its defensive and offensive effects improve your current setup.

Compare Before Salvaging

• Messerschmidt's Reaver — do not keep it simply because it is a Legacy Unique. Compare its actual value with your current two-handed setup.
• Duplicate Legacy Uniques — keep additional copies only when they offer better rolls or serve another build.
• Any Legacy Unique that loses clearly in both primary effects and useful secondary stats can be salvaged.

Verdict: Legacy status makes an item worth checking, not automatically worth keeping. Compare the actual effect, rolls, and build interaction before deciding.

Soul Splinters — Judge the Effect, Not Just the Rarity

Soul Splinters are socketed into Jewelry, and Leoric's Crown also counts as Jewelry for their effects. Their value depends heavily on whether the bonus and drawback fit your farming or combat loop.

For example:

Splinter of Anguish

• Bonus: Attack Speed and Critical Strike Chance.
• Drawback: Increased Primary Resource costs.
• Keep if: Your build benefits from more Attack Speed or Crit and can comfortably handle the resource penalty.
• Skip if: Crit is already covered or the additional resource cost disrupts your rotation.

Other common examples:

• Splinter of Lies — useful for Gold, Crafting Material, and Experience farming, but its permanent combat penalties make it less suitable for combat-focused pushing.
• Splinter of Pain — useful when its defensive benefits are more valuable than maximum clear speed.
• Splinter of the Mother — useful for builds that can consistently contact enemies and take advantage of its Vulnerable application, while the enemy-count Stun trigger can affect dense farming routes.

Avoid building your setup around duplicate copies of the same Splinter effect. Choose combinations that complement the actual content you are running.

Verdict: A higher-rarity Soul Splinter is not automatically better. Match the bonus and drawback to the activity before equipping it.

Torment Gear — Keep, Reroll, or Salvage

Once you reach Torment, item rarity alone is no longer a reliable keep signal. Season 15 allows Common, Magic, and Rare items to appear as Ancestral items with Greater Affixes, making some otherwise ordinary-looking bases worth saving.

Affix Value Reroll also gives you another reason to inspect promising Ancestral gear before salvaging it. A weak numerical roll can be worth fixing when the item already has the right Greater Affixes and other valuable investment.

Keep Immediately

• Ancestral gear with a useful Greater Affix that matches your build.
• Common, Magic, or Rare Ancestral bases with a valuable Greater Affix and the right affix combination.
• Gear with worthwhile Tempering or Masterworking progress in an important slot.
• A Unique or Legacy Unique that performs better than your equipped item after a direct comparison.

Reroll Candidate

Do not immediately salvage an Ancestral item when the affix names are correct but the numerical values are weak.

Consider Affix Value Reroll when the item already has valuable Greater Affixes or other investment that would be expensive to replace through farming.

Salvage

• Non-Ancestral gear that has no realistic use in your current progression.
• Ancestral items with no useful Greater Affix when you already have a stronger base for that slot.
• Duplicate Legacy Uniques that clearly lose against your existing copy.
• Low-value gear that cannot improve your current build or another setup you are actively preparing.

A Simple S15 Keep-or-Salvage Rule

The easiest way to manage your stash in Season 15 is to check items in this order:

1. Is it a required Rune or valuable crafting material? Keep it.
2. Is it an Ancestral item with a useful Greater Affix? Inspect it before salvaging.
3. Is it a Legacy Unique, Soul Splinter, or other build-specific item? Compare its actual effect with your current setup.
4. Does the item have valuable Tempering, Masterworking, or reroll potential? Keep it for further evaluation.
5. If it offers no useful upgrade path, salvage it.

Missing Runes, Gold, Lair Boss Keys, or a specific Unique for Season 15? Browse MMOSO's Diablo 4 Items, Runewords, Gold, and Lair Boss Keys when you know which part of your build you are finishing.

Keep Your Stash Focused in Season 15

Season 15 rewards players who know what they are building toward. Keep Runes that may be needed for Mythic crafting or Runewords, save Resplendent Sparks until you have a clear crafting route, and hold boss materials for efficient targeted farming.

For equipment, Greater Affixes and useful Ancestral bases deserve more attention than item rarity alone. Legacy Uniques and Soul Splinters should be judged by their actual interaction with your build, while Affix Value Reroll can turn a promising Ancestral base into a worthwhile upgrade instead of another salvage.