Charged Sentinel

Charged Sentinel, Singer of Surges is a Super Unique Charged Construct that can spawn in the Realm of Shadow in Diablo III. Either two of the four elemental Sentinels will guard the body of Zoltun Kulle, appearing when players approach. Killing them is not mandatory, though.

Charged Sentinel has Teleporter, Thunderstorm and Electrified affixes in combat.