Heated debate over a... what?!

While the manifestation of the earthen tower was relatively simple for Mathias, the same couldn't be said about what Nial did.

He could not afford to be distracted and had to keep every single dark energy hook in check. This required lots of focus and mental strength several times higher than Mathias and Bella had…together! 

Despite not having done any physically intensive work, just now, Nial looked like he was on the brink of collapse.

Only for a short time, he had mentally exerted himself to fortify the wall with the several hundred dark energy hooks, but it had drained him of the slightest bit of mana that resided within his body, while his mind felt mushy.

It was as if someone had trampled on his brain and that feeling was definitely not something Nial would ever like to experience again.

The air was knocked out of his lungs, making him slump to the ground. 

He only managed to utter a few words while taking deep breaths.