Quest:Adversarial Blood

... in which you summon four of the descendants of Terokk's enemies and slay them.

Objectives
Find the Skull Piles in the middle of the summoning circles of Skettis. Summon and defeat each of the descendants by using 10 Time-Lost Scrolls at the Skull Pile. Return to Hazzik at Blackwind Landing.

Objectives:
 * Darkscreecher Akkarai slain
 * Karrog slain
 * Gezzarak the Huntress slain
 * Vakkiz the Windrager slain

Description
The descendants held prisoner by the Skettis talonpriests are listed in this book: Gezzarak the Huntress, Karrog the crystal giant, the heretic known as Darkscreecher Akkarai and Vakkiz the Windrager. They will all need to be slain before Terokk returns to this world.

You will need the scrolls carried by the time-lost arakkoa to call them forth at the summoning circles in Skettis. These are powerful beings you will be facing; you would do well to bring friends.

Progress
Have you completed your task, ?

Completion
Excellent! Take this. I've prepared this bundle with items symbolizing the foes you've defeated. They will allow you to summon Terokk.

Beware,. He is the most powerful arakkoa to ever exist. Do not underestimate him!

Rewards

 * +350 Sha'tari Skyguard reputation
 * Time-Lost Offering
 * at 70
 * +100 rep for each descendant killed, for an additional total of +400 Sha'tari Skyguard reputation

Details and notes
For each of the 4 summonings:
 * You will need 10 Time-Lost Scrolls.
 * Every member of the party receives credit for the kill.

Any skull pile, except for the ancient skull pile, will allow you to summon any one of the 4 mini-bosses. (You are given a choice of which to summon.) You will need to wait for the skulls to reset before summoning another at that circle.

This quest was changed in patch 2.4, though no mention was made in the patch notes. The change removed the requirement to loot trophy tokens from each of the four mini-bosses, and replaced it with a kill requirement instead. This allows all members of the party to gain credit for the quest with a single summon of each boss. The change is especially beneficial because it allows a party to gain five time-lost offerings (and by extension, five chances to summon and kill Terokk) from a single collection of 40 scrolls. However, this change also means it is no longer possible to gather the offerings via auction or other means of trade as a shortcut to completing the quest.

The use of the trophy tokens was recycled into a repeatable quest, Quest:Tokens of the Descendants, which allows a player to get more Time-Lost Offerings as needed. If you keep the tokens from this quest, you can essentially get a 'free' offering.

On a final note, if you still have the pre-patch version of the quest in your log, you will need to abandon it and return to Hazzik to pick up the new version.