You're All Dead

"Don't Fall! Stabilise yourself!" 

A yelled reverberated across vicinity where a group could be seen standing in mid air. Beneath them was a dark pit that looked liked it had infinite depth. The surroundings not only had dark clouds but crazy weather as well.

The group of nineteen who seemed to be standing in mid air amidst this darkness were actually standing on a very thin line that stretches across the vicinity. 

Due to its immense thinness, it was impossible to spot it with naked eyes. Yet the line was right there and they had to stabilise themselves as they walked across it.

Even powerful mixedbloods would have a difficult time walking on a line that was so thin, it became invisible to the naked eyes so it wasn't surprising to see some of the people in this group struggle.

Stabilising oneself without movement was a herculean task, talk more of while moving.