From Destinypedia, the Destiny wiki
The boss encounter will start once the last Conflux is stabilized. Players will fight the Network Cyclops in a tight area, meaning that damage could almost always harm them. There's still cover for players to hide behind, but since the boss is elevated, they will be damaged as long as the Void blast is in the vicinity. The Network Cyclops will also enter a Berserker Rage for every sub-bar. To make this encounter easier, players could shoot the explosive cubes near it to destroy the Mind instantly.
List of Appearances
Destiny 2 First Appearance