"... These will be our last line of defence, and we'll activate them if we don't have the chance to safely retreat to the gate…"
"You heard the man, let's do it!" the king shouted, while others yelled in response. They all moved and started activating their formations. As for William, he remained in the tunnel, took out his Troll, and started activating it.
From experience, he knew it'd take an hour to activate this Troll, just almost the same time needed for the three formations to get ready. He decided to go all out this time, over-infusing the Troll with his spirit power, so it'd have a much broader range and fiercer power in its attacks.
The moment they started using the formations, everything changed. They finally found their time to breathe, and killing the endless stream of enemies without the need to personally get involved was like a heaven-sent gift to all of them.