Secretaries

The bomb was made out of a small amount of a Master-level esoteric with a known tendency to explode if it ever experienced inertia for more than a certain amount of time. The esoteric had been attached to his heart, such that if his heart stopped beating, the esoteric mass would stop, experiencing inertia for enough time, causing it to explode.

As a result, it would yield an explosion that would vaporize everything within a radius of ten kilometers from the epicenter.

'That's insane,' Rui heaved a sigh. 'I can't survive that kind of firepower, especially if I'm up close.'

He knew that Masters were powerful, but the fact that such an enormously powerful explosion could be considered only quasi-Master-level was hard to parse. 

'I'm glad that Martial Masters have perfect control over their raw power,' Rui heaved a sigh. 'Otherwise, I might have died in the battle between Master Haishi and Master Zeamer.'