Field of Lightning
"What's happening?" The student with the sword shouted as he slashed the head of a Crust-Mantle, hearing the mild sounds of thunder, "Did a Tier 3 Frenzy Beast make a move?"
"No, they are locked up in their cages. They cannot come out," The student with the shield replied as he bashed his shield into the face of a One-Horned Rhino, "This seems to be something else."
Students huddled in many places came out to peek at the source of the sounds. Most of them failed to see anything. As the sounds weren't loud enough, they didn't bother investigating it further and returned to their hiding spots, planning to buy time until they were ready enough for the final charge.
Those who were operating in places nearer to Jyorta could clearly hear the sounds of the air cracking apart. Like the rising tide, the sounds increased in might.