Who Sent You?

Who Sent You? is awarded for killing 100 Assassins or Stygian Abductors in the Maw. At tier 3 of Eye of the Jailer, the Jailer starts spawning Assassins to harry the player. Defeat them (or other players' assassins...) to advance progress on this achievement.

If the character has completed Focusing the Eye during the Chains of Domination campaign, the removal of the Eye mechanic made it impossible to complete this achievement solo. The only way to continue this achievement at that point was by party syncing with a character who has not yet completed the quest.

In patch 9.1.5, Mawsworn Blackguard mobs were added to the Maw and serve as targets for this achievement, regardless of Korthia quest progression.