Diablo 4 Season 15: Hell's Legacy Guide, Rewards, End Date

Diablo 4 Season 15 is the Season of Hell's Legacy, which launched on September 15, 2026 with patch 3.2.1 as the centerpiece of Diablo's 30th anniversary. You defeat echoes of Diablo, Baal and Mephisto to collect three Splinters of Evil, bear one of them for an Iconic Power, and chase Soul Splinters plus nine permanent legacy Uniques. Blizzard has not announced an end date, but press reports expect Season 16 in early December 2026, after its 3.3.0 test realm ran from October 27 to November 3. This guide covers the questline, every seasonal mechanic, the Season Rank and battle pass rewards, the patches since launch and what comes next.

Checked against Blizzard's Season of Hell's Legacy overview, the 3.2.1 to 3.2.4 patch notes and the 3.3.0 PTR announcement on November 12, 2026.

Everything below comes from Blizzard's own posts unless it is marked as a press report. The one open question is the end date: Blizzard's 3.3.0 PTR post names Season 16 but gives no start date, so any specific December date is an estimate until Blizzard confirms it.

When did Diablo 4 Season 15 start, and when does it end?

Season 15 started on September 15, 2026, and it has no official end date yet. According to press reports, login and server problems briefly delayed the launch on September 15, and Solo Self-Found mode was temporarily switched off when the season first went live.

Event	Date	Status
Season 15 launch, patch 3.2.1 (Build #73552)	September 15, 2026	Confirmed by Blizzard
Patch 3.2.2 (Build #73764)	September 30, 2026	Blizzard patch notes
Patch 3.2.3 (Build #73883)	October 14, 2026	Blizzard patch notes
Patch 3.2.4 (Build #74043)	October 28, 2026	Blizzard patch notes
3.3.0 PTR for Season 16 (PC only)	October 27 to November 3, 2026	Confirmed by Blizzard, now closed
Season 15 end and Season 16 start	Early December 2026	Press estimate, not announced

When the season ends, Seasonal characters move to the Eternal realm. Blizzard used the Season 14 changeover to carry War Plans progress into Eternal, and it set a rule for Hardcore players starting this season: to save a dead Hardcore character's War Plans points, you need one other living Hardcore character in the same partition when the season changes. Even a level 1 storage character counts.

What is the Season of Hell's Legacy questline?

The seasonal questline sends you after echoes of the three Prime Evils to collect their Splinters of Evil, then lets you bear one Splinter at a time for a combat power and its own reputation track. Deckard Cain's lost soul starts the story, and the fights take place beneath Tristram Cathedral (Diablo), at Arreat Summit in the Worldstone Chamber (Baal) and in the Durance of Hate (Mephisto).

Prime Evil	Splinter	Iconic Power damage	Activities it modifies
Diablo	Splinter of Terror	Fire	Helltide, Infernal Hordes
Baal	Splinter of Destruction	Cold	The Undercity, Lair Bosses
Mephisto	Splinter of Hatred	Physical	The Pit, Nightmare Dungeons

All three Splinters also modify the Tree of Whispers. Each reputation track holds eight activity modifiers and six upgrades to the Iconic Power, and you unlock them through War Plans. The trade-off is built in: bearing a Splinter makes you more vulnerable to the Prime Evil it came from.

To change tracks, collect another Splinter from the largest Waking Nightmares. Patch 3.2.4 raised the stack size for Prime Evil Splinters from 1 to 99, so spare Splinters no longer clog your inventory. Do not use a Splinter before the questline is finished. Patch 3.2.3 stopped that bug from happening, but it did not repair characters already stuck. Blizzard's fix for those is to create a new character in the same partition and finish the questline, which unlocks Prime Evil Powers for every character in that partition.

How do Waking Nightmares work?

Waking Nightmares are rebuilt encounters from earlier Diablo games, and they come in three sizes. Blizzard's BlizzCon panel said they draw on Diablo I, Diablo: Hellfire, Diablo II, Diablo III and Diablo Immortal, with nearly twenty returning bosses such as Nihlathak and the Maggot Queen.

• Largest: multi-level Capstone dungeons that recreate the Prime Evil showdowns. You meet them in the questline, can replay them on Torment for rewards, and can open them as pinnacle Capstones at Torment 10 and above. These are also where you earn a new Splinter.
• Standard: normal-length dungeons with fixed map locations, such as the Den of Evil.
• Smallest: one-room encounters that appear in the open world, such as the giant spider Queen Araneae or waves of Flayers.

What are Soul Splinters in Diablo 4?

Soul Splinters are seasonal gems that grant a strong bonus and carry a drawback, and you can equip up to three of them in your jewelry slots. They drop as Magic, Rare, Legendary or Unique, and the Amalgamation recipe in the Horadric Cube combines Splinters of the same type and rarity into the next rarity.

• Splinter of Anguish (Andariel)
• Splinter of Sin (Azmodan)
• Splinter of Lies (Belial)
• Splinter of the Black Soulstone
• Splinter of Pain (Duriel)
• Splinter of the Mother (Lilith)
• Splinter of Hellfire (Na-Krul)
• Splinter of Damnation (Skarn)

Which legacy Uniques came with Season 15?

Season 15 added nine legacy Uniques based on classic Diablo items, and they stay in the game permanently on both Seasonal and Eternal realms. Five of them also exist as Unique Charms. For where the rarest drops come from, see the Diablo 4 Uber Uniques farming guide.

Unique	Slot	Classes	Also a Charm
Leoric's Crown	Helm	All	No
Nemesis Bracers	Gloves	All	Yes
Stone of Jordan	Ring	All	Yes
Sirloin of the Bovine	Legs	All	No
Arioc's Needle	Two-handed polearm	Barbarian, Druid, Spiritborn	Yes
Henri's Perquisition	Offhand focus	Sorcerer, Necromancer, Warlock	Yes
In-Geom	One-handed sword	All except Spiritborn	Yes
The Furnace	Two-handed mace	Barbarian, Druid, Necromancer, Paladin, Warlock	Yes
Messerschmidt's Reaver	Two-handed axe	Barbarian, Druid, Necromancer, Paladin, Warlock	No

What else changed in patch 3.2.1?

Beyond the seasonal theme, patch 3.2.1 shared War Plans progress across characters, made Mythic crafting more predictable and added two Horadric Cube rerolls. These are the changes that matter most for day-to-day play:

• Shared War Plans: War Plans reputation is shared by every character that matches on Eternal or Seasonal, Hardcore or not, and Solo Self-Found or not. Each character still keeps its own planner.
• Mythic Uniques: there are three ways to make one: the Horadric Cube's Upgrade Direct Item to Mythic recipe, the Jeweler's Rune Crafting, or the Blacksmith's Mythic Cache. The Cube recipe costs more but keeps every affix, temper and masterwork, and the result carries a Crafted tag. Only one Crafted item can be equipped. The Blacksmith also sells a second cache that rolls only Iconic Mythics.
• New Cube recipes: Affix Value Reroll rerolls base affixes on gear and Talismans while protecting Greater Affixes, enchants, tempers and Transfigurations. Horadric Reroll fully randomizes base affixes on Legendary or better Charms and Seals without touching set bonuses or Unique powers.
• Rebirth: converts an Eternal character into a level 1 Seasonal character, keeping class, name, appearance and Hardcore state. The character must hold no items when you use it.
• Horadric Post: a one-way mailbox Blizzard uses to deliver rewards and commemorative items.
• Loot: Legendary drop rates went up in Torment I to V, every Unique can now drop from level 1 on any difficulty, and Initiate Lair Bosses now match Greater Lair Bosses for Mythic drop rate. Gold Caches from Whispers pay about three times more, roughly 100 million Gold at Torment XII.

The patch also rebalanced all eight classes. The Season 15 best builds tier list covers what that did to the meta.

What are the Season 15 rewards and battle pass?

The Season Rank system has nine ranks and 125 objectives, and the free Battle Pass Reliquary is open to every player. Blizzard notes that about 15% of the seasonal objectives need the Lord of Hatred expansion, including objectives required to finish Rank VIII.

Reward source	What you get
Season Ranks (up to)	14 Skill Points, 42 Paragon points, 10 Resplendent Sparks plus those in Mythic Caches, 5 Mythic Unique Caches
Season Rank cosmetics	Dark Wanderbear pet, Banner of the Three Mount Trophy, 2 Emblems, 2 Titles (Deckard's Confidant), 4 Title Laurels
Season Rank materials	Crafting and Masterworking materials, Lair Boss Keys, Runes, Sigils, Charms and Seals
Free Battle Pass Reliquary	Eidolon Mount, Eidolon's Barding Mount Armor, Ancient Town Portal
Deluxe Battle Pass (2,800 Platinum)	Archangel of Justice armor set, Lordling of Terror pet, Wings of Justice

For the first time, the Armor Reliquary has a separate armor set for each class. Smoldering Ashes from objectives and chapter rewards buy Season Blessings from five Urns: Curiosities (chance of a second item from the Purveyor of Curiosities), Reclamation (rare salvage materials), Masterworking (extra Obducite), Glyphs (chance of an extra glyph upgrade) and Ancestral Whispers (chance of an Ancestral Cache from Whisper turn-ins). The launch Twitch drop, the Deforestation two-handed axe, ran from September 15 to September 29 and has ended.

What patches has Season 15 received?

Since launch, Blizzard has shipped three small patches and no class balance changes. Patch 3.2.2 fixed a questline blocker at the Worldstone Chamber portal, the Edge and Lore Runewords, and a Pulverize bug that could keep a Staggered boss immobilized. Patch 3.2.3 fixed the early Splinter bug, made Baal's loot easier to pick up and let the Cube reroll Impairment Reduction, Barrier Generation, +Healing and Critical Strike Damage. Patch 3.2.4 is the Splinter stack size change plus stability fixes.

What comes after Season 15?

Season 16 was tested on the 3.3.0 PTR and centers on War Plans and a new Horadric Items system. Blizzard's PTR post lists War Plans Tactics, a meta progression layer that raises the odds of the activities and rewards you prefer, plus Marks of Wisdom, a new currency for respeccing War Plans nodes. It also adds Tyrael's Boons, a seasonal War Plans tree; Horadric Items, which link equipped gear to Talisman set bonuses; and a Pandemonium fight against two Corrupted Reapers at once. Blizzard says some Season 15 features will carry forward without naming them yet, and press reports expect the launch in early December.

Further out, Blizzard confirmed at BlizzCon 2026 that the Amazon class arrives as a Class Pack in the first half of 2027 and that Diablo V is coming in spring 2029. Lord of Hatred, released April 28, 2026 (April 27 in the Americas), added the Paladin and Warlock, so Season 15 has eight playable classes. According to press reports, Blizzard plans no more full Diablo 4 expansions but will keep releasing seasons. More news lands in updates.

Related guides

• Diablo 4 best builds tier list for Season 15
• Diablo 4 leveling guide: fast 1 to 70 and Paragon
• Diablo 4 Uber Uniques: how to get them and where to farm
• Diablo 4 hub