The birth of the Nightmare changed the balance of power in the Star Sea.
Any plane that wasn't unified was unstable internally.
On those ununified planes, some indigenous people wanted to use the Nightmare to achieve unification, while others hoped to turn the tide with its help and resist powerful factions or colonists from other planes.
The factions currently capable of colonization were doing everything they could to defend their colonies and had no strength to launch new plane wars.
Few factions were unaffected by the Nightmare, like the Spore Jungle and the Wrynn Family.
Before the Loran City-State and Lothar City-State stabilized their colonies on other planes, the Wrynn Family could only wage plane wars alongside the Spore Jungle or find planes to attack on its own.
The upheaval brought by the Nightmare was undoubtedly the best opportunity to venture into the Starry Sea.
Factions capable of waging war across the Star Sea were straining to deal with the Nightmare's threat to their established territories.
Whoever could free up their forces before the others would gain the initiative amid the upheaval in the Star Sea.
Medivh and the Spore Queen wouldn't let the opportunity pass. Recently, they had been using War Goblins and Spore Goblins to lure the Nightmare into self-destructing against indigenous factions.
When the time came to strike, they did. In early February of the following year, the indigenous factions of the Liyue Plane had been weakened enough, and the Spore Queen decisively launched an all-out war against this Eighth-Rank Plane.
By day, the Myconid-Bone Spirit Allied Forces swept through the land like wildfire, flattening one indigenous town after another.
At night, Fourth-Generation God-Forged Mechas formed block fortresses to withstand the Nightmare's attacks.
The suicidal attacks launched by the indigenous warriors couldn't shake the Myconid-Bone Spirit mobile