According to the battle plan that Liu Yan and the core members of Team Origin had discussed, the third phase of the battle was also the key one between Team Origin and Team Lighthouse.
The third phase of the battle was a multi-tiered defense.
After all, there was a huge difference in strength between Team Origin and Team Lighthouse, even with the advantage of the terrain and the help of the Withered Tree Spirit.
The strength of Team Origin was still not enough to face Team Lighthouse head-on. They couldn't even defend themselves.
If they forcefully engaged in direct defense, either they couldn't defend at all, or they barely managed to hold their ground, resulting in heavy casualties. It was not a scenario that Team Origin wanted to see.
Hence, Liu Yan and the core members of Team Origin decided to use a multi-tiered defense.
They formed multiple lines of defense and multiple defensive Team Lighthouse.