Shadowblight Necromancer Endgame Build Guide for Diablo IV Season 12 - Slaughter

Qax can trigger off ANY non-Basic Skill. This often triggers and consumes all of your resources. This can sometimes cause issues for the build, when used. If you're not Pushing, consider removing this Rune and use the setup from the Speedfarming variant instead.

Umbral

Each unique Crowd Control effect that you inflict upon enemies triggers this aspect and generates Essence. Corpse Tendrils, Decrepify and Crippling Darkness all apply CC when used or activated. You can layer these abilities as well.

• Corpse Tendrils initially Slows, then it Pulls and Stuns. This is 3 instances of CC on every target. BUT after the Pull, the Slow is removed from the target, so you're able to re-Slow with Decrepify for another free CC proc.

Essence per Second and Resource Cost Reduction

Essence per Second (EPS) affix on the Helm, Chest and Boots helps to passively replace Essence as you cast your damage skills. Resource Cost Reduction reduces the cost of every skill by a percentage equal to the total on your gear. Since the base rolls of EPS add up to 12 and the Necromancer regains 3 EPS, you generate a total of 15 per second. To completely replace the Essence loss of 1 cast per second you need 40% Resource Cost Reduction. This would allow you to go "infinite", meaning you would never run out of Essence. When casting your skills more than once per second, you need more of both stat to achieve this equilibrium.

Exposed Flesh/Lucky Hit: Chance to Restore Primary Resource

The Aspect gives Essence on Lucky Hit for any enemy you hit that is Vulnerable. The Lucky Hit Chance Temper works on a target regardless of Vulnerable Status. This makes the vast majority of your Essence gain automatic.

Grim Harvest

Whenever you consume a corpse via Corpse Explosion, Raise Skeleton or Aspect of Explosive Mist you generate Essence with this passive. You get to recoup resources while applying DPS. It's a great two for one!

• While the mechanics are significantly more nuanced than this, and many things in game slightly obfuscate the truth, understanding Lucky Hit Chance is fairly simple.
  • With Advanced Tooltips activated in your Gameplay Settings, you can see a Skill's innate LHC.
  • Not every Skill has a LHC even though things may cause those Skills to deal damage.
  • A Skill must apply damage to a target to have a chance to trigger LHC.
  • LHC effects do not have LHC and can't trigger other LHC effects.
  • Skills check for LHC EVERY time they deal damage to ANY targets. There's no limit or "one per cast" mechanics.
• To calculate the chance of triggering something, you take your Skill's LHC, multiply that by (1 + (Total Bonus Lucky Hit Chance / 100)) and then multiply that by the Effect's LHC.
  • Blight has an innate LHC of 40%.
    • HUGE CAVEAT HERE: Damage over Time effects show an expected chance of applying Lucky Hit Chance over the total length of the Skill's duration, at least once, to a single target. So Blight is "lying" a little bit. Its chance of applying Lucky Hit with the initial damage is 22.54% and each damage tic has a 2.11% chance.
  • The Mythic Variant gets 52.1% LHC Bonus, and Decrepify has a 15% chance to trigger Cooldown Reduction on your skills.
  • So the equation is 22.54% * (1 + (52.1/100)) * 15% = 5.14% chance to trigger for the initial damage, and 2.11% * (1 + (52.1/100)) * 15% = .481%. But it hits the target a total of twelve times with its tic, so the total chance to trigger it once per cast is (100% - (100% - 5.14%)) + (100% - (100% - .481%)^12) = 6.13%.
    • This seems low but you can stacks pools, which can all deal their damage simultaneously and drastically increase your chance of proccing something once per second.
    • With the ability to bast Blight 2.6 times per second, by the end of the first six seconds you have stacked 14.6 effects, bringing your chance of triggering Decrepify once per second up to 89.5%.

Read up more on Attack Speed in our dedicated guide by Ava.