Diablo Immortal Season 15 patch notes — Bone Prison raid, monetization rollback, 2 new Helliquary bosses

Highlights

• 12-player raid: Cathedral of Bones — the

first raid above 8 players, with 3 bosses and a 4-week lockout

• 2 new Helliquary bosses — Lilith and

Diablo, the first 2 of the "Prime Evils" series

• Monetization rollback — Legendary Crates

removed entirely, replaced with deterministic rewards

• New zone: The Dry Steppes — Act VI content

for level 60+ players

• Full cross-progression parity — mobile and

PC accounts now share all progress, including Eternal Orbs and cosmetics

• New class: Spiritborn — Diablo IV's class

added to Immortal with custom abilities

Cathedral of Bones raid

The Cathedral of Bones is the first 12-player raid in Diablo Immortal. It launches with 3 bosses and a 4-week lockout.

• Boss 1: Skeleton King — fight the

reanimated king of Tristram, with mechanics that require 4 players to absorb

• Boss 2: Diablo (corrupted) — a corrupted

form of the Lord of Terror, with 3 phases

• Boss 3: Malthael (raid version) — the

Angel of Death returns as the raid's final boss

Each boss has unique mechanics that require 12-player coordination. The raid is tuned for Paragon 400+ characters.

Rewards:

• Crate of Bones (raid-exclusive loot

table)

• Raid-specific set pieces
• Mount: "Bonewing Drake" (5% drop rate

from final boss)

• Title: "Bone Collector" (1-time reward

for clearing)

• 2 Legendary Gems (guaranteed from final

boss, monthly)

2 new Helliquary bosses

The Helliquary is Diablo Immortal's single- player boss mode. Season 15 adds 2 new bosses:

• Lilith — Daughter of Hatred, the

antagonist of Diablo IV. The Helliquary version is a recreation of her Sanctuary invasion.

• Diablo — the Lord of Terror himself.

The Helliquary version is the original Diablo form from Diablo I.

Each boss has:

• 3 difficulty tiers (Helliquary I, II,

III)

• Unique rewards (Souliquary upgrades,

legendary gems)

• One weekly clear (with bonus rewards

for the first clear of the week)

Lilith and Diablo are the first 2 bosses of the "Prime Evils" series — more bosses (Mephisto, Baal, Azmodan) will be added in future seasons.

Monetization rollback

This is the biggest change in the patch. Blizzard is removing the Legendary Crate system entirely:

• Before: pay-to-roll legendary gems via

Legendary Crates

• After: all legendary gems are earned

via gameplay, with deterministic drop rates

The change is a response to community backlash about the Legendary Crate monetization in 2024-2025. The dev team acknowledged in a BlizzCon 2026 panel that "the Legendary Crate system was unsustainable for the long-term health of the game."

The Eternal Orbs (premium currency) remain but are now used for cosmetic-only purchases. The paid battle pass remains but with adjusted pricing.

This is the most aggressive monetization rollback in Diablo Immortal's history.

The Dry Steppes (new zone)

The Dry Steppes is a new Act VI zone for level 60+ players. The zone is:

• Desert-themed — open area with multiple

sub-zones

• 3 new Helliquary incursion points
• 2 new world bosses (re-spawning every

3 hours)

• New story content — 6 quests that

bridge the gap between Act V and the new raid

The zone is smaller than the Fractured Plains but more focused. Expect 4-5 hours of story content and 20+ hours of endgame farming.

Spiritborn class

The Spiritborn is Diablo IV's class, now added to Immortal. The class is a glaive- wielding warrior that summons animal spirits.

• Primary weapon: Glaive
• Spirit animals: Jaguar, Eagle, Gorilla,

Centipede

• Combo system: animal-specific

abilities that synergize

• Playstyle: mid-range, high mobility

The Spiritborn is the 8th class in Diablo Immortal. The class is free to unlock for existing players via a level 60 quest chain.

Bug fixes

• Fixed the "Eternal Orbs not syncing"

cross-progression bug

• Fixed the Helliquary boss "stuck on

loading" issue

• Fixed the Cathedral of Bones entrance

that wouldn't open for party leaders

• Fixed the Legendary Crate visual glitch

that showed incorrect contents

• Fixed the Spiritborn tutorial that was

missing the final boss

• Fixed the Daily Login reward timer that

wasn't resetting

• Fixed the Paragon reset bug that

affected 0.5% of players

• Fixed the chat filter that was

incorrectly flagging common words

• Fixed the zone transition crash in the

Fractured Plains

• Fixed the Souliquary upgrade that

displayed wrong costs

Performance

• Mobile: 10-15% frame rate improvement

on iPhone 12+ and Samsung Galaxy S21+

• PC: 5-8% memory reduction in the

Cathedral of Bones raid

• Cross-progression: 30% faster syncing

between mobile and PC

• Loading times: 20% faster in the

Dry Steppes zone

Balance

Class changes

• Barbarian: damage increased by 8%
• Crusader: shield generation increased

by 12%

• Demon Hunter: multishot damage

increased by 6%

• Monk: spirit generation increased by

10%

• Necromancer: minion damage increased

by 8%

• Wizard: arcane orb damage increased

by 5%

• Spiritborn: base tuning (new class)

Helliquary balance

• Lilith: HP reduced by 5% on Helliquary

I (was overtuned)

• Diablo: Helliquary III damage reduced

by 8%

• Old bosses: rewards increased by 10%

to match the new bosses

Cross-progression parity

Season 15 ships full cross-progression parity between mobile and PC. Previously, some items (cosmetics, certain currencies) were not synced. Now:

• All currencies sync (Eternal Orbs,

Platinum, Gold)

• All cosmetics sync (transmogs,

pets, wings)

• All gear sync (with level-appropriate

stat scaling)

• All quest progress sync
• Paragon levels sync

This means you can play on mobile during your commute and on PC at home, with no progress loss.

What's next

• Season 16 (October 2026): New class

rework, Malthael Helliquary boss, 2v2 ranked arena

• Season 17 (December 2026): Anniversary

season, free class unlock for all players

• 2027 roadmap: New campaign chapter,

2 new zones, 2 new raids

FAQ

When does Season 15 launch?

August 18, 2026.

Is the Legendary Crate removal a

permanent change?

Yes — the dev team confirmed at BlizzCon 2026 that the Legendary Crate system is removed permanently.

Is the Spiritborn free?

Yes — unlocked via a level 60 quest chain for all existing players.

Is the raid cross-platform?

Yes — mobile and PC players can raid together.

What level do I need to be for the

raid?

Paragon 400+ recommended. The raid is tuned for 12 players with 4 healers, 4 tanks, 4 DPS.

Will the cross-progression affect my

existing account?

No — your existing progress remains. New cross-progression features just unlock.

Can I still buy Eternal Orbs?

Yes — for cosmetic purchases only. Gameplay-affecting items are no longer purchasable.