10 Time-Lost Scrolls are used at an Ancient Skull Pile to summon one of 4 level 72 elites for working on the N [70+] Adversarial Blood quest.
These are dropped by Time-Lost Skettis which you can not see unless you have taken a [Elixir of Shadows] which you get from the repeatable quest N  World of Shadows that require 6 [Shadow Dust] for each elixir.
The following are the mobs that are summoned:
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