People would hate this, but here's mine:

DEATH'S ADVANCE

Unique Arcane Boots
Prefixes:
(10 - 15)% Increased Movement Speed for every 100% increase you have to Necrotic Damage
No Implicit Modifiers
Suffixes:
(05 - 10)% Reduced Movement Speed
(14 - 16)% Cooldown Recovery Speed for Traversal Skills

Requires level 55

The end comes for us all; and more swiftly than one might imagine...

Hidden property:
Can only drop from undead enemies