William adjusted the formation so it'd release the final blow in the same direction as his arrow. But he just wanted to make sure nothing wrong would happen and asked her to intervene and control the technique as well.
As the arrow landed, a fierce explosion happened. Faint cracks spread, and before they'd heal, the deadly torrent of the punch technique she used fell over the same point, and that made the cracks deepen and spread fast.
William couldn't see much using his eyes, but with spirit sense, he could clearly see the cracks. It was a great result, but it wasn't enough.
"Again!" as he predicted, they would fail in taking down this shield in one hit, "aim at the same point! Do it again!"
The masters in the formation were already unleashing the second wave of the technique. The moment he shouted, Lina waited for the techniques to gather around, before she released another hit, then another, and another.