Who is attacking us?

"It's-"

Kairen opened his mouth to explain, but he didn't manage to say more than only the first word.

BBBBBOMMMMMM

It was because a loud explosion interrupted him. 

It was the sound of something hitting Kairen's magical shield and at the same time Aaron's wall that Kairen and his two friends were sitting on. The wall shook intensely and the shield also cracked a little bit.

"Urgh-"

Kairen, who felt a sudden pain throughout his body after his shield was damaged, curled up a little bit, only to be caught by Serria and Reyan and be pulled back so that he wouldn't fall down from the quivering stone wall. 

"What the-"

Serria grabbed her sword, hurriedly standing up to stand in front of Kairen while Reyan did the same time and stood behind him. 

BOOOOOOOOMMMMMM

Another explosion happened at the same time just like before, shaking the wall as well as damaging Kairen's shield. 

"Cancel your shield!"