Diablo IV's Season of Hell's Legacy starts September 15 with Deckard Cain's return and the Prime Evils' powers; Switch 2 launch the same day

BlizzCon announcement: Switch 2 and Season of Hell's Legacy

Blizzard announced at BlizzCon 2026 that Diablo IV is coming to Nintendo Switch 2 on September 15, as reported by Wowhead. A new season, Season of Hell's Legacy, launches the same day.

The season serves as the centerpiece of Blizzard's 30th Anniversary celebration for Diablo. It includes iconic Diablo items, bosses, and locations such as Deckard Cain, Tristram, Diablo, and the Stone of Jordan. The seasonal questline runs through a living history of Diablo's past games, refreshed and recreated for Diablo IV, and players can encounter memories of legendary heroes and notorious foes from Sanctuary's history.

Season features

Season of Hell's Legacy is built around the return of the Prime Evils and the lost soul of the Horadrim Deckard Cain, who brings news of three dark wanderers leaving trails of death behind them.

Face the Prime Evils in the seasonal questline

Amid the dead rising from Pandemonium, players confront the three dark wanderers and delve into the nightmares of their past. Completing the seasonal questline means collecting three Splinters of Evil by defeating echoes of Diablo beneath Tristram Cathedral, Baal at Arreat Summit, and Mephisto within the Durance of Hate.

Players choose which Prime Evil's power to bear, build reputation through activities tied to that Splinter, and unlock modifiers and upgrades through War Plans. Returning to the largest Waking Nightmares allows players to change the Splinter they wield.

While bearing a Splinter of Evil, players become dark wanderers themselves. An Iconic Power periodically erupts during combat, dealing Fire damage for Diablo, Cold damage for Baal, or Physical damage for Mephisto. The Splinter also makes the player more vulnerable to its associated Prime Evil.

• Diablo's Splinter of Terror modifies Helltide and Infernal Hordes
• Baal's Splinter of Destruction modifies The Undercity and Lair Bosses
• Mephisto's Splinter of Hatred modifies The Pit and Nightmare Dungeons
• All three modify the Tree of Whispers

Battle iconic enemies in Waking Nightmares

Waking Nightmares are three types of encounters showing memories from key events in Diablo's past, rebuilt with updated visuals and encounters designed for Diablo IV.

The largest are multi-level, Capstone-type dungeons recreating historic showdowns with the Prime Evils. They are first encountered in the Seasonal Questline and can be replayed afterward on Torment levels with fixed difficulty, and appear as pinnacle Capstones at Torment 10+ for greater risks and bigger loot.

The second type appears as standard-length dungeons recreating familiar moments, such as the Den of Evil from Diablo II, at fixed locations across the world. The third and smallest type appears suddenly in the open world as a one-room encounter with a past boss such as Queen Araneae, or waves of monsters such as Flayers.

Bear the duplicitous Soul Splinters

Soul Splinters are special gems for the season, each associated with a powerful demon or artifact. They offer a powerful boon but carry a liability, and up to three can be equipped in Jewelry slots. They drop as Magic, Rare, Legendary, or Unique, and Amalgamation in the Horadric Cube upgrades Soul Splinters of the same type and rarity to the next highest 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)

Endgame updates

Season 15 brings several endgame changes, including shared War Plans progress, more deterministic Mythic Unique crafting, and new Horadric Cube recipes.

Streamline progress with shared War Plans

Starting in Season of Hell's Legacy, War Plans reputation points earned by one character are shared across alts on the account that exist in the same partitions: Eternal or Seasonal, Non-Hardcore or Hardcore, and Normal or Solo-Self Found. Characters sharing points each have their own planners to allocate them, similar to shared skill or Paragon points.

War Plans progress from Season 14 characters carries over to Eternal when the season changes on September 15, adding together across characters in the same partition. For Hardcore, only living characters at the end of Season 14 can transfer points, and deceased characters contribute nothing.

From Season 15 onward, a dead Hardcore character's War Plans progress transfers to Eternal at season's end only if one other living Hardcore character exists in that same partition, even a level 1 storage character. That living character deposits the accumulated points into Eternal Hardcore War Plans progress when it moves to Eternal.

Customize with Mythic Unique crafting updates

The methods to create Mythic Uniques remain the same, but outcomes are more deterministic. The Horadric Cube's Upgrade Direct Item to Mythic recipe costs more than the Blacksmith or Jeweler routes but performs a total 1:1 transfer, retaining all affixes and modifications such as Tempering and Masterworking. It cannot be used on Unmodifiable items.

Mythic Uniques made with the Horadric Cube recipe carry a Crafted tag, and only one Crafted tag item can be equipped. Items from the Jeweler's Rune Crafting or the Blacksmith's Mythic Cache carry no such tag.

Blizzard notes that after PTR feedback, Iconic Mythics will remain Mythic-quality only, and a second Blacksmith Cache option has been added that only rolls for Iconic Mythics, at the same cost as the Mythic Uniques cache.

• Horadric Cube: Upgrade Direct Item to Mythic
• Jeweler: Rune Crafting > Mythic Uniques
• Blacksmith: Forge > Mythic Cache

Hone your gear with new Horadric Cube crafting recipes

Two new recipes come to the Horadric Cube in Season 15, giving more control over unwanted affixes while protecting desired traits.

Affix Value Reroll rerolls all base affixes on equipment and Talisman items, Charms and Seals, while protecting Greater Affixes, Enchanted affixes, Tempers, and Transfigurations, unless the item is Unmodifiable. Horadric Reroll, available for Legendary+ Charms and Seals, fully randomizes all base Affixes without touching Set Bonuses or Unique and Mythic charm powers.

Legacy Uniques

Season of Hell's Legacy introduces nine legacy Uniques based on fabled relics of the past, including Messerschmidt's Reaver, the Stone of Jordan, and Henri's Perquisition. These are permanent additions available on both Seasonal and Eternal realms. Items marked as Charms are also available as Unique Charms.

• Leoric's Crown (Helm) - all classes
• Nemesis Bracers (Gloves) - all classes, Unique Charm
• Stone of Jordan (Ring) - all classes, Unique Charm
• Squirt's Blouse (Chest) - all classes, Unique Charm
• Arioc's Needle (2H Polearm) - Barbarian, Druid, Spiritborn, Unique Charm
• Henri's Perquisition (Offhand Focus) - Sorcerer, Necromancer, Warlock, Unique Charm
• In-Geom (1H Sword) - Barbarian, Druid, Rogue, Necromancer, Paladin, Sorcerer, Warlock, Unique Charm
• The Furnace (2H Mace) - Barbarian, Druid, Necromancer, Paladin, Warlock, Unique Charm
• Messerschmidt's Reaver (2H Axe) - Barbarian, Druid, Necromancer, Paladin, Warlock

New quality of life features

Season 15 adds two quality of life systems: the Horadric Post and Rebirth.

Enjoy rewards with the Horadric Post

The Horadric Post is a new way for the Diablo IV team to deliver rewards and messages directly to an account. It occasionally contains deliveries carrying rewards, supplies, and commemorative items. The system is one-way, described as a postal box straight from the ether.

Continue your legacy with Rebirth

Rebirth converts a character from the Eternal realm to the Seasonal realm, resetting it to level 1. Instead of creating a new character each season, players can select an Eternal character to continue its adventures, and a running tally of hours played across all of that character's Rebirths is maintained.

Rebirth keeps the character's class, name, appearance, and state, Normal or Hardcore. Cosmetic preferences saved as part of an ensemble, including transmogs, pigments, mounts and accessories, pets, portals, and headstones, can also transfer.

Before using Rebirth, all gear and items must be moved into the Eternal stash. A warning appears before confirming, since any retained items are lost, and Rebirth cannot be used until the character has no items equipped or in its personal inventory.