Warwatcher, Eye of Xivu Arath

Warwatcher, Eye of Xivu Arath is an Ultra-ranked Hive Shrieker and commander in Xivu Arath's Horde. It first appeared in the Season of the Seraph and is the final boss of Heist Battleground: Europa. It was sent into the Yggdrasil Stack on Europa to merge with the mainframe and steal Submind framework data.

The fight: the Warwatcher teleports after losing a sixth of its health. At half health it closes and Arc-Charged Wrathborn spawn. Defeating five of them and depositing their arc charge into the centre pillar forces it open again, and it can then be finished off.