Unholy Presence

Unholy Presence is the Death knight PvP Presence available at level 70. While active, the Death Knight's attack and movement speed is increased. It also decreases the global cooldown by 0.5 sec and reduces rune régénération by 10%.

Tips

 * Unholy Presence can be useful when running long distances on foot, such as when recovering from a wipe in an instance, as it increases the Death Knight's movement speed. For shorter distances, the rune cost of switching to Unholy Presence and then back to Blood or Frost Presence again is generally not worth the brief speed boost.

Background
Unholy Presence is likely derived from the Haste ability used by the Death Knight unit in Warcraft II and the Unholy Aura ability used by the unit in Warcraft III.