The Zurglings

"Has he come here alone?!" Wyrstriker asked via the System Channel as he looked around and saw only the new and improved Forneus rampaging forward. 

"Affirmative, the others are being teleported via the airbase and will make their ascent to the skies from there." The System replied, implying that Forneus was a one-time exception, especially since it had taken quite a considerable amount of energy to teleport the large beast into the middle of the warzone. 

The major disruption of chi and magic in the air had caused the portal to be fairly unstable and the System had been required to apply extra resources and channel more processing capability to ensure that the portal would not break halfway during the teleport. That was one of the reasons why it did not usually portal monsters into the thick of battle (Another was that the cheapskate System lamented the loss of extra resources).