Diablo 4 Season 15: Everything You Need to Know

Season 15: Season of Hell’s Legacy

Season 15 will bring new content and systems to Diablo 4.

• Diablo Franchise 30th Anniversary
• Soul Splinters
• Waking Nightmares
• New Uniques
• Mythic Unique Changes
• New Mythic and Unique Charms
• Character Rebirth
• Overland Ambushes – new seasonal mechanic
• Witcher 3 Collaboration
• Horadric Post
• Prime Evil Alignment Powers

Season 15 Start Date

Season 15 will launch on Tuesday, September 15th, 10:00 AM PDT.

If you are new to seasonal play, check out our introduction to the Seasonal Realm and our Season Checklist for quick tips.

New With Season 15

With a new season comes new content, and this time around we’re being given powerful new gems that give unique effects and powers. Character Rebirth finally makes its appearance in Diablo IV as a highly requested feature, as well as new Challenge Dungeons and multiple Unique changes across the board.

Soul Splinters

Similar to past powers, these special gems give players their usual resistances, along with a unique power that can greatly increase a character’s power. Since they do come with gems’ usual stats, they’re certain to replace the normal gems when socketed into jewelry.

Soul Splinters come in a variety of different rarities, allowing players to begin collecting them incredibly early in their journey.

Waking Nightmares

Portals will now open while players farm in the Overworld; upon activation, they will remain open for around a minute before disappearing. Once entered, players will be put into a small arena with multiple braziers around the room. Interacting with the various braziers will raise the difficulty of the encounter before the showdown begins.

• Helltide will be the most common area to encounter these Challenge Dungeon Portals since players will most commonly be farming there in the overworld.

Since Helltide is typically where players congregate, the new Overland Ambushes will typically be encountered during Helltide as well.

Diablo’s 30th anniversary is upon us, and with it comes returning legendary figures of the franchise, including Deckard Cain. Entering the portals found throughout the overworld, players may encounter the prime evils of the franchise, and finally… Diablo makes his appearance in a slightly informal format due to it being an anniversary event. Players may also encounter other enemies from the franchise’s past, if they’re unfortunate enough.

New Uniques

We’re getting 9 new Uniques in Season 15, with some nostalgic favorites returning such as Leoric’s Crown and Squirt’s Neck… Blouse.

Despite being added during Season 15, these are all permanent additions. We’ve gone ahead and listed them below;

Squirt’s Blouse – When not taking Damage, you take up to 50% and deal up to X more damage. This bonus is reset upon losing life

Character Rebirth

After a long-long wait, Diablo IV is finally getting Character Rebirth in Season 15. With the new Rebirth system, players can reset their former characters back to level 1 and begin a new season with them.

This is somewhat of a full reset, as any inventory items or currencies will be removed. However, your character’s Class, Name, Appearance, and state (such as hardcore or normal) will remain the same. Additionally, all cosmetic preferences will stay saved, and your played time on the character will remain intact.

Rebirth is a welcome quality-of-life addition; instead of deleting a character each season, we can now just hit the reset button and go again.

Witcher 3 Collab

Season 15 will be bringing new Witcher 3 exclusive skins. Based on past collaborations, it’s safe to assume these will be for a limited time only.

This will be in preparation for The Witcher 3 Wild Hunt Remastered, which is coming to the Battle.net store on September 29, 2026.

New Horadric Cube Options

Players no longer have to worry about rolling away Greater or Enchanted Affixes with the Affix Value option. Luckily, this may be used on Charms as well as gear. This dramatically helps with potentially ruining an item players have sank currency into.

Secondly, we’re getting an option called Horadric Reroll. This fully rerolls Legendary and Mythic stats on Charms and Seals without changing Set Bonuses or Powers, another welcome addition.

Horadric Post

No longer an unknown, the Horadric Post offers a new way for Blizzard to deliver rewards to players. Although not game-changing, this is a nice QoL feature added into Diablo IV.

Prime Evil Alignment

Players will be able to choose a Prime Evil, then acquire a power unique to their choice. As an example, Diablo is centered around Fire damage, while Baal is Cold and Mephisto is Physical. These powers work similarly to past seasons throughout the Diablo IV franchise, but picking between one of these iconic figures should prove quite interesting.

The chosen alignment comes with a reputation track, which will be the primary way players unlock new powers based on their progression.

Other Season 15 Changes

Here are some additional changes worth mentioning:

• War Plans Updates
  • Account-wide progression
• Class Balancing and Item Updates
• New Twitch Drops

Season 15 – Quick Overview

• Rebirth Feature
• Waking Nightmares
• Witcher 3 Collaboration
• New Seasonal Powers
• Mythic Item Changes
• Horadric Post
• New Legacy Uniques
• New Horadric Cube Recipes
• War Plan Updates
• Horadric Cube Updates
• Class and Item Updates
• Soul Splinters
• New Reliquaries
• As with the previous seasons, it is likely that several builds will emerge as strong contenders for Season 15, each excelling in specific areas. Check out our respective Tier Lists for a closer look at which builds are exceptionally strong this time around.
  • Diablo 4 Build Tier Lists

If you are unsure of what to tackle during a new season, have a look at our suggested season checklist.