Clive The Hive lurks at Giants Husk. Like Randal The Vandal, he is the new king of patrols. Concealed within the body of a lowly Acolyte, Clive is so much more. After taking multiple shotgun rounds and 4 Gally shots, Clive slinked away and disappeared...
https://youtu.be/TqHsBY_8wDE
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I met his Brood Mother near the Archons Forge, she's one tough witch. 14 Gjallarhorn shots = no effect.