Just ran into this guy today. Conned as would take an army to defeat. Hits for up to 1350 on us, did not have a tank. Guardian does rampage as well. We weren't ready and wiped us out.
Have killed attendant of Light numerous times but today, this guy spawned after killing him. Was lvl 65 and had quite a few hitpoints and has same model as Warden Hanvar. After killing him received an emote "A thunderous explosion rocks the spire as the beacon atop the tower shatters." and most of the mobs despawned in that area. He dropped Discordant Shield of the Beacon. Magic Lore attunable, 30ac Dex, Sta, Wis, Int, Agi, 95hp 90mana, end 8sv Fire, cold, magic, 9sv dis. req lvl 57
Have killed attendant of Light numerous times but today, this guy spawned after killing him. Was lvl 65 and had quite a few hitpoints and has same model as Warden Hanvar. After killing him received an emote "A thunderous explosion rocks the spire as the beacon atop the tower shatters." and most of the mobs despawned in that area. He dropped Discordant Shield of the Beacon. Magic Lore attunable, 30ac Dex, Sta, Wis, Int, Agi, 95hp 90mana, end 8sv Fire, cold, magic, 9sv dis. req lvl 57