At this moment, Mark was very far behind Dustin.

“D*mn it! Do they have wheels for legs or what?!” Mark had to run at full speed to catch up to them, and he was livid.

What he did not know was that Dustin was actually limiting his speed.

As he continued chasing after Dustin, he found that his stamina had run out. He had spent his pure energy far too quickly.

Mark could not understand it.

He knew that Metal Mask was strong based on the aura he released, so it only made sense that he could not catch up to him, but Dustin was young. He should have already reached his limit after reaching the sovereign grade. How could he have that much pure energy?

Just when Mark was beginning to doubt his abilities, he discovered to his joy that Dustin had slowed down drastically.

“You finally used up your pure energy, didn’t you?” Mark sneered.

Meanwhile, Dustin frowned. He noticed that since Metal Mask found out that he could not shake him off, he had slowed down.

As for Mark, when he