Outset of a Power Struggle

"If you dare walk this path with me, take your first step. It's now or never!"

- Edelgard Outset of a Power Struggle is the last chapter of White Clouds if the player sided with Edelgard after the Black Eagles version of Throne of Knowledge. In it, Edelgard declares war on the Church of Seiros and leads a charge on Garreg Mach Monastery.

Story
After siding with Edelgard after the skirmish in the Holy Tomb, Hubert teleports the party away and they all find a way into an Imperial provisional camp to discuss the next course of action. Flayn, however, leaves to protect Gareg Mach alongside the Church of Seiros. Edelgard confronts her house on the matter of the revelations regarding archbishop Rhea and the Church of Seiros and asks if they are willing to fight alongside her, to which they all comply. Within the camp many have conflicting feelings about the turn of events and contemplate their various situations. Additionally, two Imperial commanders have been added into the assault, Ladislava, Edelgard's head of personal guard and Randolph, Caspar's uncle.

After preparations have been made Edelgard directs her army in an assault on the Monastery. While the fight is intense, Edelgard is ultimately triumphant in her assault, forcing Rhea and the Knights of Seiros out of Gareg Mach Monastery. However, before she is forced to retreat she incapacitates Byleth, forcing them into a five year slumber.

Initial enemies
The initial assault is predominately against Armor Knights, with Mercenaries and Pegasus Knights additionally strewn around. If a unit goes too far down the center road an ambush will spring, spawning various powerful units. The main objective of the map is to defeat the enemy commanders: Seteth, Flayn and Gilbert. The boss, Rhea, can only be reached once these three have been defeated.

Reinforcements
Rhea properly appears on the map and switches the objective to defeating her. The inner sanctum switches to ranged units such as Archers and Priests to utilize the Ballista and Magic Orb, with the center road being reinforced with two Golems and the side roads adding in more Mercenaries. Catherine and Cyril are also deployed alongside Rhea in the inner sanctum, however they do not need to be defeated.