Time-Lost Scroll

10 Time-Lost Scrolls are used at an Ancient Skull Pile to summon one of 4 level 72 elites for working on the Adversarial Blood quest.

These are dropped by Time-Lost Skettis which you cannot see unless you have taken a Elixir of Shadows which you get from the repeatable quest World of Shadows (quest) that require 6 Shadow Dust (Outland) for each elixir.

The following are the mobs that are summoned:
 * Darkscreecher Akkarai
 * Karrog
 * Gezzarak the Huntress
 * Vakkiz the Windrager