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Since ancient times, the City Defense Barrier within the Sea of Realms had been meant to prevent outside enemies from besieging the city.
It guarded against external threats but not internal ones, so if one found a way to directly open a gateway from within the city to outside, capturing a city would become exceptionally simple.
The only difficulty was whether the mercenaries sent could withstand the encirclement and killing by the city's garrison and strong warriors.
This was because activating the Array Plate of the portal would generate massive spatial fluctuations and also required a certain amount of activation time.
After all, ripping through the Protective Shield of the city to create a spatial lock and maintaining the portal from collapsing were necessary.
"Within the border city, there might be a few Fifth Tier Epics, but certainly not many. As for the combat power of the garrison of the Wild Boar Skin dynasty, tsk tsk..."
