He was an Archon... I encountered this mini boss with a friend while exploring as well.. Ours was when you go back through the way you initially enter Old Russia at the beginning.. the actual fight took place in the open room at the end of all the hallways you went through that lead to the pipe that has the big fans in it...
English
-
Edited by The Jabberwock: 7/26/2014 6:01:40 PMThat's where it was in the beacon mission I did too.