Diablo 4’s Season 15, Season of Hell’s Legacy, is the centerpiece of the franchise’s 30th anniversary, and patch 3.2.1 is doing a lot more than dressing the game in nostalgia. It rewires how Mythic Uniques are made, makes War Plans reputation account-wide, drops nine Legacy Uniques from older Diablo games into the permanent loot pool, and hands out one of the broader class balance passes in recent memory.
Quick answer: Season of Hell’s Legacy goes live on September 15 at 10:00 a.m. PDT with patch 3.2.1. Before the changeover, park any perfectly rolled Unique you plan to upgrade into a Mythic, and keep at least one living Hardcore character in each partition so its War Plans points survive the transition to Eternal.
The Splinters of Evil questline and reputation tracks
Deckard Cain returns as a lost soul with a warning about three dark wanderers, and the seasonal questline sends you into their nightmares to kill echoes of the Prime Evils. Diablo waits beneath Tristram Cathedral, Baal at Arreat Summit, and Mephisto in the Durance of Hate. Clearing all three gets you the three Splinters of Evil, but you can only carry one at a time.
Whichever one you bear turns you into a dark wanderer yourself. An Iconic Power erupts from your character during combat — Fire for Diablo, Cold for Baal, Physical for Mephisto — and the same Prime Evil you’re channeling hits you harder in return. Each Splinter has its own reputation track with eight activity modifiers and six upgrades to that Iconic Power, all unlocked through War Plans. Swapping paths means going back to the largest Waking Nightmares to pick up a different Splinter.
| Splinter of Evil | Iconic Power damage | Activities it modifies |
|---|---|---|
| Diablo’s Splinter of Terror | Fire | Helltide, Infernal Hordes |
| Baal’s Splinter of Destruction | Cold | The Undercity, Lair Bosses |
| Mephisto’s Splinter of Hatred | Physical | The Pit, Nightmare Dungeons |
All three tracks also modify the Tree of Whispers, so Whisper farming stays relevant no matter which Prime Evil you side with.
Soul Splinters are jewelry gems that cost you something
Separate from the Prime Evil Splinters, Soul Splinters are socketable gems for jewelry, and you can run up to three across your available jewelry slots. Each one is tied to a demon or artifact, and each pairs a strong upside with a genuine liability. They drop as Magic, Rare, Legendary, or Unique, and Amalgamation in the Horadric Cube combines matching splinters of the same type and rarity into the next tier up.
| Soul Splinter | Upside and cost |
|---|---|
| Splinter of Anguish (Andariel) | Critical Strike Chance and Attack Speed, with 30% higher Primary Resource costs |
| Splinter of Sin (Azmodan) | Big Maximum Health boost, 30% less Maximum Primary Resource |
| Splinter of Lies (Belial) | Huge Gold, crafting material, and XP gains while permanently Weakened and Vulnerable |
| Splinter of the Black Soulstone | Stacking damage on kills, but you take more damage per stack |
| Splinter of Pain (Duriel) | Damage Reduction at the cost of 30% Movement Speed |
| Splinter of the Mother (Lilith) | Unhindered and Vulnerable on contact, then a self-stun after enough touches |
| Splinter of Hellfire (Na-Krul) | Massive damage bonus, zero Critical Strike Chance |
| Splinter of Damnation (Skarn) | Elite kills raise Monster Power briefly — harder packs, better farming |
Three types of Waking Nightmares
Waking Nightmares are rebuilt memories of classic Diablo moments, and they come in three sizes. The largest are multi-level Capstone-style dungeons recreating the historic showdowns with the Prime Evils; you meet them first in the questline and can replay them afterward. Like all Capstones they run at a fixed difficulty, with pinnacle versions available at Torment 10 and above for better loot.
The middle tier behaves like normal dungeons with fixed world locations, including a rebuilt Den of Evil from Diablo II. The smallest kind opens as a portal in the open world for a single-room fight — a past boss such as Queen Araneae, or waves of familiar monsters like Flayers.
Shared War Plans and the Season 14 carryover
War Plans reputation is now shared across characters on your account, as long as those characters sit in the same partition for all three of these categories: Eternal or Seasonal, Non-Hardcore or Hardcore, and Normal or Solo Self-Found. A Seasonal Non-Hardcore Non-SSF character shares with another Seasonal Non-Hardcore Non-SSF character, but not with a Seasonal Non-Hardcore SSF one.
Levels and progress are shared; allocation is not. Each character keeps its own planner, the same way skill and Paragon points work, so alts can specialize without stepping on each other.
War Plans points from Season 14 carry over to Eternal at the September 15 changeover and add to whatever you already have in the matching partition. Hardcore has a catch: only living characters transfer points. If a Hardcore character dies before the season flips, its progress is gone unless another living Hardcore character in that same partition makes the trip to Eternal — even a level 1 storage character is enough to deposit the accumulated points.
Mythic Unique crafting and the Crafted tag limit
The three routes to a Mythic Unique are unchanged, but the outcomes are far more predictable. The Horadric Cube’s Upgrade Direct Item to Mythic recipe is a straight 1:1 conversion — feed it a Tibault’s Will with the affixes, Tempering, and Masterworking you want, and you get a Mythic version of that exact item with everything intact. It costs more than the other two options, and it will not work on an Unmodifiable item, so do not Transfigure a candidate you plan to upgrade.
The tradeoff is the Crafted tag. Only items made with the direct upgrade recipe carry it, and you can equip just one Crafted item at a time. Everything else stacks freely.
| Method | Result | Crafted tag |
|---|---|---|
| Horadric Cube: Upgrade Direct Item to Mythic | Exact 1:1 Mythic version of the item you put in | Yes |
| Jeweler: Rune Crafting | Random class-appropriate Mythic for the slot you pick | No |
| Blacksmith: Mythic Cache | Random Mythic Unique, plus a second cache that rolls only Iconic Mythics | No |
One PTR experiment did not survive. Unique-quality versions of Iconic Mythics were cut after feedback that they diluted the top chase items, so Iconic Mythics stay Mythic-only. In exchange, the Blacksmith got that second cache option dedicated to Iconic Mythics, priced the same as the standard one.
New Horadric Cube rerolls and the resistance buff
Two recipes give you control over bad affix rolls. Affix Value Reroll rerolls all base affixes on equipment and Talisman items while protecting Greater Affixes, Enchanted affixes, Tempers, and Transfigurations, provided the item is not Unmodifiable. Horadric Reroll is the Charm and Seal specialist, available on Legendary and better, and it fully randomizes base affixes without touching Set Bonuses or Unique and Mythic charm powers.
Resistances got a serious correction. Single Resistance affixes on gear, Charms, and Tempering recipes are now worth seven times an All Resistance affix, with single resistance values on charms scaling as high as 3,000. All Resistance Tempering values were re-tuned to match.
Legacy Uniques and which classes get them
Nine relics from older Diablo games join the loot pool permanently, not just for the season. Their affixes nod at the originals but are retuned for Diablo 4’s itemization — Leoric’s Crown, for instance, counts as Jewelry and boosts socketed gems rather than copying the Diablo II formula. Several can also be crafted into Unique Charms, including Stone of Jordan, The Furnace, Arioc’s Needle, Henri’s Perquisition, In-Geom, Nemesis Bracers, and Squirt’s Blouse.
| Legacy Unique | Slot | Classes |
|---|---|---|
| Leoric’s Crown | Helm | All |
| Nemesis Bracers | Gloves | All |
| Stone of Jordan | Ring | All |
| Squirt’s Blouse | Chest | All |
| Arioc’s Needle | 2H Polearm | Barbarian, Druid, Spiritborn |
| Henri’s Perquisition | Offhand Focus | Sorcerer, Necromancer, Warlock |
| In-Geom | 1H Sword | Barbarian, Druid, Rogue, Necromancer, Paladin, Warlock |
| The Furnace | 2H Mace | Barbarian, Druid, Necromancer, Paladin, Warlock |
| Messerschmidt’s Reaver | 2H Axe | Barbarian, Druid, Necromancer, Paladin, Warlock |
Class balance changes in patch 3.2.1
The headline number is the core stat scalar. Barbarian drops from 1.1 to 0.8, while Druid, Paladin, and Sorcerer climb from 1.25 to 1.625 — a big swing in how raw stats convert into damage.
| Class | What changed |
|---|---|
| Barbarian | Core stat scalar cut to 0.8 plus damage reductions across several skills, though Whirlwind stays at the top |
| Druid | Scalar raised to 1.625, Fleshrender buffed, Song of the Old Mountain set bugs fixed |
| Necromancer | Army of the Dead now stacks up to five times; Blood Surge, Blood Lance, Corpse Explosion, and Soulrift buffed; Rathma’s Waking Touch redesigned with damage nerfs; Exhumation glyph generates corpses |
| Paladin | Scalar raised to 1.625, with buffs to Blessed Shield, Thorns, and several oaths |
| Rogue | Rain of Arrows and Barrage escape untouched; underperformers like Flurry get buffs |
| Sorcerer | Scalar raised to 1.625, plus Deep Freeze, Ice Shards, Meteor, and Enchantment Master node buffs |
| Spiritborn | The Tzo Rune bug granting 600% bonus damage is fixed, offset by large Paragon board, core skill, and unique weapon buffs including Rock Splitter and Payback |
| Warlock | Dread Claws, Fiend of Abaddon, and Metamorphosis demon scaling buffed; Dynamism legendary node slightly nerfed |
Several Uniques were retuned alongside the classes. Melted Heart of Selig’s resource bonus falls sharply, Tibault’s Will loses half its Resource Regeneration, Razorplate’s Thorns damage goes up, and Banished Lord’s Talisman was rewritten and is no longer available to Paladin, Spiritborn, or Warlock.
Drop rates, crafting costs, and XP changes
Loot and economy tuning is where the season’s grind gets easier. Every Unique can now drop at level 1 in any difficulty, Legendary drop rates rise in Torment I through V, and Mythic rates increase from Greater Lair Bosses, Initiate Lair Bosses, Belial, and random sources. Lair Boss Mythics now pull from that boss’s own pool, though generic loot still leaves a small chance at anything else.
| Change | Detail |
|---|---|
| Echo of Mephisto | Better loot quality overall, including a guaranteed Mythic drop |
| Occultist enchanting | Forgotten Soul cost on Ancestral items drops from 25 to 10 |
| Jeweler gem crafting | Royal Gems fall from 30 to 10 Forgotten Souls, Grand Gems from 300 to 50 |
| Sigil Powder | Random Magic Tribute costs 100 instead of 200; Infernal Horde Compass 500 instead of 666 |
| Salvage returns | Legendary Tribute returns 500 and Mythic Tribute 2,500 Sigil Powder, up from 25 each |
| Helltides | Fewer Experience Orbs from Plague Maggot Young; Portent of Pain and Plague Devourers drop 1-2 instead of always 2 |
| Whisper Caches | Gold rewards roughly tripled, hitting about 100 million at Torment XII |
| Torment XP bonus | Torment X to 1300%, Torment XI to 1500%, Torment XII to 1700% |
War Plans XP now scales heavily with Torment level, with any node in Torment X and above awarding four Experience Orbs instead of two. Elites in Torment X and above also drop substantially more Gem Fragments and have a much better chance to cough up a Royal Gem.
The prep list before September 15 is short. Stash away any Unique with ideal affixes, Tempering, and Masterworking that you want converted into a Mythic on day one, and leave it un-Transfigured. Check that your Hardcore characters are alive if you want their War Plans points to survive. Then pick a Prime Evil and accept that whatever power you take will be hunting you back.
