The Essence of Eternity

Essence of Eternity is the second mission in the Into the Void Epilogue campaign of Legacy of the Void.

Background
"Amon's shadow will devour all. Kerrigan, may the last of my essence give you the power you need."

- Ouros

Ouros began to channel his essence into Kerrigan in order to complete her transformation into a xel'naga. However, this process would leave her exposed to Amon. Jim Raynor was put in charge of coordinating her defense while she channeled Ouros's power, with Zagara and Artanis aiding her.

Mission
"They're assaulting our base from the other side. These bastards don't let up do they?" "Why would they? Tenacity is advantageous in war." "That isn't what I- Ah hell nevermind."

- Raynor and Zagara

As Kerrigan channeled Ouros's power, she was assaulted by void thrashers. She was able to use her newfound power to annihilate them, but such a power would stall her transfer. Kerrigan's allies set up defensive positions around her, while Shadows of the void came in from all directions. Raynor was forced to send forces to reinforce them before they fell. More void thrashers were summoned to assault Kerrigan, but were quickly dispatched.

Raynor held his position, and Kerrigan managed to channel the power, sending a blast that destroyed the shadows of the void in the area. Kerrigan ordered Zagara to take control of the Zerg Swarm, and to remember the lessons she had taught her.

Aftermath
"With the last of our essence, a new eternity dawns. The Infinite Cycle have come to their end."

- Ouros's last words

Ouros departed the last of his essence to Kerrigan, stating the Infinite Cycle had now ended, and died. With the last of the xel'naga essence, Kerrigan changed form into that of a flaming angel, brimming with power. She sent a vision to Raynor, saying that the moments they had together would always be with her, but that they had to go. Raynor told her to finish this fight, and Kerrigan flew off to face Amon.

Walkthrough
In this mission, the player spawns as the Terran in the center, and has defenses on the western approach. Allies hold the east and southern approaches, but in limited number. The goal is to defend Kerrigan, and to keep allied forces alive as long as possible in order to use them as a buffer. Kerrigan can be used in a similar fashion to the Drakken laser drill from The Dig, but given the larger number of enemies it is recommended that she only be used for very high priority targets. First priority should be taking the expansion west of the starting base, in order to get the extra resources needed for a defense.

Wings of Liberty campaign units are available, and as such mercenaries should be called down whenever possible. Siege tanks, bunkers and turrets should defend the Terran and Protoss essence, while a mobile force should defend the zerg base. Structures cannot be built on the zerg's creep, but they will provide a stronger defense and Zagara will respawn when slain (Artanis will not) and as such does not need as much defense until later in the mission.

Use Kerrigan to take out void thrashers or high priority targets like brood lords that outrange static defenses. Try to avoid overusing it, as the last pushes are brutal and can come down to seconds.