Unholy Death Knight Frequently Asked Questions — Shadowlands 9.1
On this page, we go over several of the most frequently asked questions regarding Unholy Death Knight in World of Warcraft — Battle for Azeroth Shadowlands 9.1. This will be updated as more common repeated questions surface over the course of the expansion.
How should Soul Reaper be used in the rotation when you hit 35% on the target?
Soul Reaper should be used off cooldown if the target's health is
35% or below. You can also use Soul Reaper before the target hits 35%,
as long as the target will be 35% or below when the Soul Reaper debuff
expires.
How does the buff from Frenzied Monstrosity work?
Frenzied Monstrosity applies both a buff to you and your pet. The
buff applied to you always lasts 15 seconds and cannot be extended. The buff on
your pet lasts as long as 
Dark Transformation lasts, meaning it can be
extended.
When does the strict Mastery diminishing return hit?
At 68.4% Mastery.
Do I need to play around procs of Runic Corruption?
No. The procs stack on top of each other. Any remaining duration is simply added to the new one if you get another proc.
How does the stat proc off Inscrutable Quantum Device work?
During 
Bloodlust/
Heroism, your highest stat by raw rating
is chosen and the duration is increased to 25 seconds. Outside of
Bloodlust/Heroism, one of your top 2 stats (by raw amount) is chosen
randomly.
Changelog
- 29 Jun. 2021: Guide reviewed and updated for Patch 9.1.
- 10 May 2021: Added a number of FAQs.
- 19 Jan. 2021: Guide reviewed and completely updated.
- 23 Nov. 2020: Updated for Shadowlands.
- 12 Oct. 2020: Page updated for the Shadowlands pre-patch.
More Death Knight Guides
Guides from Other Classes
This guide has been written by Bicepspump, a semi-hardcore player raiding with Wicked Vigilantes on Kazzak. He is heavily involved in the DK DPS theorycrafting community, testing hyoptheses and investigating the correct priority to use. He is also a useful-minion in the Acherus discord, frequently answering questions and discussing optimisations (do not hesitate to reach out). He produces guide-content on YouTube and frequently streams on Twitch.
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