For 10 sec, your movement speed is increased by 35%, you cannot be slowed below 100% of normal speed, and you are immune to forced movement effects and knockbacks.
Passive: You cannot be slowed below 70% of normal speed.
Your movement speed is increased by 35%, you cannot be slowed below 100% of normal speed, and you are immune to forced movement effects and knockbacks.
Patch 10.0.0 (2022-10-25): Now learned at level 9 (was 42).
Patch 9.0.1 (2020-10-13): Now learned at level 42 (was 55).
Hotfix (2018-07-18):Fixed a bug preventing Death's Advance from functioning correctly in certain encounter situations, such as Aggramar's Flame Rend.
Patch 8.0.1 (2018-07-17): Re-added and redesigned as a baseline ability for all death knight specializations.
Old: Increases movement speed by 15%.
Hotfix (2016-08-02):The Unholy specialization no longer includes Death’s Advance.
Patch 7.0.3 (2016-07-19): Redesigned as a passive ability for Unholy.
Old: You passively move 10% faster, and movement-impairing effects may not reduce you below 70% of normal movement speed. When activated, you gain 30% movement speed and may not be slowed below 100% of normal movement speed for 6 seconds.
Patch 5.0.4 (2012-08-28): Redesigned as a talent for all specs (was a tier 4 Unholy talent).
Old: While your Unholy Runes are both depleted, movement-impairing effects may not reduce you below 60/75% of normal movement speed.
Hotfix (2011-02-11):Death's Advance may now not allow movement-impairing effects to reduce the death knight below 60/75% of normal movement speed, down from 75/100%.
[Death's Echo], 
[March of Darkness]
Patch 10.0.0 (2022-10-25): Now learned at level 9 (was 42). 
