On the Summit Battlefield, Medivh hadn't summoned any Fifth- or Sixth-Rank Bone Spirits from other planes to join the fight.
This war was led by the Myconids. The Fifth- and Sixth-Rank Bone Spirits were only here to get an early taste of the Summit Battlefield.
The future belonged to the Bone Spirits, but they weren't strong enough yet.
Now that the battle had reached the stage of revealing their full strength, the Myconids stopped holding back. They began greatly increasing the numbers of Sixth- and Seventh-Rank Myconids, forcing the Indigenous Kingdom to reveal its trump cards.
Once the Indigenous Kingdom had exhausted its trump cards, even more powerful Myconids joined the battle. Some Eighth- and Ninth-Rank Myconids arrived outside the Plane Barrier to seal off the plane.
The natives of the Tianlu Plane had nowhere to run. The forces from other planes they'd contacted through special means saw so many Eighth- and Ninth-Rank Myconids guarding the Tianlu Plane and began weighing the costs and benefits.
In this situation, they would need to muster a large army and a number of high-ranking Transcendents to have any chance of winning.
The more intense the war, the longer it took to assemble the forces.
After all, the Transcendent powerhouses of each faction couldn't just sit around at their headquarters. They were carrying out missions in different regions, or even on different planes.
Plane Portals weren't something they could open whenever they wanted. Each opening cost a great deal.
Take the Gevot City-State's Plane Portal, for example. It was only opened for large-scale operations or supply runs.
There was basically no chance of opening a Plane Portal to move a small number of people, unless it was an extreme emergency.
The forces from other planes took their time discussing the risks, but the Indigenous