Dataminer

Dataminer, Unearths Spoils, is a Unique Ghastly Gravedigger found in the Defiled Crypt in of Diablo III. He can only spawn in a fake crypt, as well as the one that has the Jar of Souls.

In combat, he has Thunderstorm, Electrified and Jailer affixes.

Killing him is required for the Haunted achievement and can also be a Bountry in Adventure mode.

Trivia

 * This monster's name and title are a possible reference to "dataminers"; individuals who extract raw data from beta and PTR game servers before they are officially published. The "unearths spoils" line may refer to the concept of spoilers emerging from this activity.