If the player attempts to flee from it, the Ceaseless Void will stop the attack and quickly move near the player before resuming. At the start of the attack, it will also summon two Laser Portals that orbit around the player, firing two sets of slow Laser Beams towards them. When the total HP of Dark Energies reaches 50%, all Dark Energies despawn as the Ceaseless Void becomes vulnerable, positions itself near the player, and begins sucking in both nearby players and a 4-armed spiral of invincible Dark Energy Balls that converge on it, with the spiral growing in speed and density as the attack goes on. The Ceaseless Void itself will initially hover directly above the player, but will cycle through 8 different positions around the player over time, moving one position counterclockwise every 8 / 6 / 4 seconds. The Dark Energies will oscillate back and forth relative to the Ceaseless Void while also rotating around it in a clockwise manner. Upon being summoned, the Ceaseless Void is completely invincible to damage, and 11 Dark Energies are spawned in a 3-armed star formation centered on the boss.
The Ceaseless Void does not spawn on its own and requires the player to summon it by using the Rune of Kos in the Dungeon.
