Diablo 4 Season 16 changes Blood Moon Breeches and reworks The Mortacrux
Multiple skills and Paragon nodes also receive damage buffs, and the Book of the Dead bonuses get adjusted.

Season 16 is not that far away anymore, since it is supposed to open at the beginning of December. We should soon get more information about the Seasonal theme and what was adjusted since PTR. But it is the perfect time to go over a few of the changes regarding classes, including Necromancer.
Diablo 4's Season 16 PTR came with a few changes to the Necromancer, including a redesign of two Unique items that could affect existing builds.
Blood Moon Breeches exchange their offensive bonus for Damage Reduction
The Mortacrux gets an entirely new effect that turns consumed Corpses into powerful Core Skill attacks
There are also some damage buffs for multiple skills, adjustments to the Book of the Dead's sacrifice bonuses, and buffs to multiple Legendary Paragon Nodes.
We will not go over everything, but here are the most interesting Necromancer changes from the Season 16 PTR. Keep in mind that anything can still change before the season release, especially numbers.
Blood Moon Breeches Lose Their Critical Strike Damage
The two Unique changes we already mentioned are probably the biggest part of this patch for Necromancer, so let's go over them in more detail.
Blood Moon Breeches are getting one of the biggest changes. Previously, the Unique pants gave your Summons a 7-10% chance to apply
Decrepify or
Iron Maiden when dealing damage. You also gained 50-60% increased Critical Strike Damage against enemies affected by your Curses.
Season 16 reduces the Curse application chance to 5% and completely replaces the offensive bonus. Instead, you gain 20-30% Damage Reduction from Cursed enemies.
That is a pretty big change for builds relying on the current Critical Strike Damage bonus. The new defensive effect could make the item useful for survivability, but Necromancers will lose a big source of damage in the process.
The Mortacrux is also receiving a full redesign. Its current effect has a chance to create a Skeletal Simulacrum whenever you consume a Corpse. The Simulacrum seeks enemies before exploding for Shadow damage.
The new version removes that mechanic entirely. Instead, every 10 Corpses you consume empowers your next base Core Skill, turning it into an Ultimate version that deals 120-140% increased damage. The item also passively consumes nearby Corpses, and its Macabre Skill Rank affix becomes Core Skill Ranks.
This gives the Unique a much more direct interaction with Core Skills. You are not relying on Skeletal Simulacra anymore to deal additional Shadow damage.
Necromancer Skills and Paragon Nodes Buffs
Obviously, Necromancer is not escaping the usual balance changes when it comes to Skills and Paragon numbers:
Skill changes
Blood Orbs
Healing Reduced from 15% to 10% of Maximum Life.
Blood Orbs now also heal your Minions for 10% of their Maximum Life.
Bone SpearDamage increased from 160% to 175%.
Pierce Damage Bonus Upgrade
Renamed to Critical Strike Chance.
Previous: Bone Spear deals 10% increased damage per enemy pierced, up to 50%[x].
Now: Bone Spear gains 10%[+] Critical Strike Chance.
Blood LanceDamage increased from 160% to 175%.
Blood SurgeNova damage increased from 125% to 140%.
SeverScythe attack damage increased from 100% to 120%.
DecrepifyLife Tap Variant - Healing reduced from 10% to 5% of Maximum Life.
Skeleton WarriorHealing Upgrade - Healing reduced from 2% to 1% of Maximum Life.
Blood WaveDamage Bonus upgrade reduced from 30%[x] to 20%[x].
Five Legendary Paragon Nodes also receive damage improvements:
Legendary Paragon Nodes
Flesh-eaterDamage bonus increased from 60% to 70%.
Scent of DeathDamage bonus increased from 45% to 60%.
Bone GraftDamage bonus increased from 60% to 70%.
WitherChance for increased damage increased from 20% to 25%.
FrailtyDamage bonus increased from 60% to 70%.
Book of the Dead and Minion Changes
And the last biggest change for Necromancer is about the minions.
Necromancers who prefer sacrificing their Minions also have some new bonuses to consider.
Skirmishers now grant 5% Critical Strike Chance and 10% Attack Speed when sacrificed
Reapers provide 40% increased Core Skill damage instead of a general 15% damage bonus
Bone Mages get a better sacrifice bonus, increasing from 20% to 40% damage
Shadow Mages now grant 40 Maximum Essence instead of 20
Cold Mages provide 15% Damage Reduction instead of increased damage against Vulnerable enemies
Blood Golems drain less health from friendly Minions, going from 30% to 15% of their Maximum Life, and the range they drain from is increased to 10 meters
Defender Warriors also gain a resistance bonus increasing from 40% to 100%
These changes are part of the Season 16 PTR, so Blizzard can still adjust them before launch. But Necromancers have different new options to play around with now. The only problem is if you were relying on
Blood Moon Breeches in particular for the Crit Strike DMG, then you will have to find a new Unique.
Necromancer
Blood Orbs
Healing Reduced from 15% to 10% of Maximum Life.
Blood Orbs now also heal your Minions for 10% of their Maximum Life.
Necromancer Skills
Bone Spear
Damage increased from 160% to 175%.
Pierce Damage Bonus Upgrade
Renamed to Critical Strike Chance.
Previous: Bone Spear deals 10% increased damage per enemy pierced, up to 50%[x].
Now: Bone Spear gains 10%[+] Critical Strike Chance.
Blood Lance
Damage increased from 160% to 175%.
Blood Surge
Nova damage increased from 125% to 140%.
Sever
Scythe attack damage increased from 100% to 120%.
Decrepify
Life Tap Variant - Healing reduced from 10% to 5% of Maximum Life.
Skeleton Warriors
Healing Upgrade - Healing reduced from 2% to 1% of Maximum Life.
Blood Wave
Damage Bonus upgrade reduced from 30%[x] to 20%[x].
Necromancer Book of the Dead
Skirmishers Sacrifice Bonus
Previous: Your Critical Strike Chance is increased by 5%[+], but the amount of Skirmishers you can Summon is reduced by 50%.
Now: You gain 5%[+] Critical Strike Chance and 10%[+] Attack Speed, but the amount of Skirmishers you can Summon is reduced by 50%.
Defenders Warriors Sacrifice Bonus
Resistance gain increased from 40%[+] to 100%[+].
Reapers Warriors Sacrifice Bonus
Previous: You deal 15%[x] increased damage, but the amount of Reapers you can Summon is reduced by 50%.
Now: Your Core Skills deal 40%[x] increased damage, but the amount of Reapers you can Summon is reduced by 50%.
Shadow Mages Sacrifice Bonus
Maximum Essence increased from 20 to 40.
Shadow Mages Upgrade 2
Barrier amount per attack reduced from 3% to 1%.
Cold Mages Sacrifice Bonus
Previous: You deal 20%[x] increased damage to Vulnerable enemies, but the amount of Cold Mages you can Summon is reduced by 50%.
Now: You gain 15% Damage Reduction, but the amount of Cold Mages you can Summon is reduced by 50%.
Bone Mages Sacrifice Bonus
Damage bonus increased from 20%[x] to 40%[x].
Blood Golem Upgrade 1
Amount of health drained from friendly Minions reduced from 30% to 15% of their Maximum Life.
Range at which it can drain from friendly Minions increased from 5 to 10 meters.
Necromancer Paragon
Flesh Eater Legendary Node
Damage bonus increased from 60% to 70%.
Scent of Death Legendary Node
Damage bonus increased from 45% to 60%.
Bone Graft Legendary Node
Damage bonus increased from 60% to 70%.
Wither Legendary Node
Chance for increased damage increased from 20% to 25%.
Frailty Legendary Node
Damage bonus increased from 60% to 70%.
Necromancer Legendary Aspects
Aspect of the Great Feast
Damage increased from 35-55%[x] to 70-110%[x].
Necromancer Unique Items
Blood Moon Breeches
Previous: Your Summons have a 7-10% chance to randomly inflict Decrepify or Iron Maiden when they deal damage. You deal 50-60%[x] increased Critical Strike Damage to enemies affected by your Curses.
Now: Your Summons have a 5% chance to randomly inflict Decrepify or Iron Maiden when they deal damage. You gain 20-30% Damage Reduction from Cursed enemies.
Gospel of the Devotee
When you hit an enemy with a Basic Skill, the bonus damage now applies to all Basic Skills, rather than Basic Skills other than the one you hit with.
Damage bonus increased from 30-40%[x] to 40-50%[x].
The Mortacrux
Macabre Skill Rank affix replaced with Core Skill Ranks.
Previous: When consuming a Corpse, there is a 40-50% chance to also create a decaying Skeletal Simulacrum that seeks enemies but cannot attack. When it dies, it explodes for Shadow damage. This effect is treated as a Macabre Skill.
Now: Every 10 Corpses you consume, your next base Core Skill is an Ultimate version that deals 120-140%[x] increased damage. You passively consume Corpses around you.
Necromancer Talisman
Radamant's Desecration
2-Piece Set Bonus: Damage increased from 50%[x] to 70%[x].
3-Piece Set Bonus: Damage reduction increased from 15% to 30%.
Peace of the Black Shroud
2-Piece Set Bonus: Damage increased from 75% to 90%.
5-Piece Set Bonus: Damage increased from 175% to 200%.
Necromancer Bug Fixes
Fixed an issue where the Skeleton Mage Singularity upgrade could allow Necromancers to have more Skeleton Mages active than intended.
Fixed an issue where Skeleton Mage's Blizzard attack did not properly apply Vulnerable.
Fixed an issue where Skeleton Mage attacks would not be considered Core Skills for some effects.
Fixed an issue where the Hematolagnia variant was scaling its damage higher than intended with Skill Ranks.
Fixed an issue where Hematolagnia applied its damage bonus inconsistently to Blood Wave.
Fixed an issue where Blood Wave with Kessime's Legacy could hit enemies more times than intended.
Fixed an issue where Blood Seeker's Blood Lance bonus damage could be applied to all enemies hit rather than only the first enemy struck.
Fixed an issue where Bone Storm did not properly benefit from duration increases when using certain variants.
Fixed an issue where Bone Spirit did not properly account for Resource Cost Reduction when calculating its damage.
Fixed an issue where Aspect of Bursting Bones caused Skeleton Warriors' activated ability to deal more damage than intended.
Fixed an issue where Aspect of Ultimate Shadow could incorrectly apply Darkness tags to Ultimate Skills.
Fixed an issue where Aspect of Potent Blood would not give the proper amount of Essence when combined with Cruor's Embrace.
Fixed an issue where Bone Storms created by Lidless Wall did not benefit from the Vulnerable Upgrade.
Fixed an issue where Radament's Desecration's 3-piece bonus did not properly grant Damage Reduction when Corpses were formed.
Fixed an issue where Radament's Desecration's 3-piece bonus did not properly grant Damage Reduction after cursing 5 or more enemies.
Fixed an issue where Rathma's Walking Touch's 3-piece bonus could fail to redirect damage to Minions under certain conditions.
Fixed an issue where Bone Weaver's Quintessence buff could randomly reset.
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