Brainstorming

"The plan is like this…" Shakdi glanced at the gates first before starting his explanation. "Since you said there is a connection between the portal and the monsters inside, I can safely assume there is a high chance for them to be connected.

"Do you mean the monsters inside are used as their connector or something?"

"Something like that." Shakdi nodded. "However, there is another thing that we can take advantage of."

"And that is?"

"The fact that there is a connection between them, I think we can seal the portal if we kill the monsters inside."

"Then let's go." Alex took out his weapons.

"Wait, wait! There is a problem."

"What is it?"