In truth, Su Chen had always been in control of his own heartbeat rate.
After all, his extreme heartbeat could reach as high as 400 beats per minute.
The reason he maintained it at 220 was merely to lull Catherine into complacency.
230 beats!
240 beats!
250 beats!
...
300 beats!
The risk associated with using a Second Rank Shura Potion was much higher than that of a First Rank.
Because it involved suddenly increasing Su Chen's heartbeat rate from 220 to over 301 in one go!
Of course, this was only concerning Catherine.
For Su Chen, both a rate of 220 and 301 were far from his extreme limit.
What seemed to be a tense process of breakthrough was actually quite simple for Su Chen.
Death risks of ten or twenty percent were nonexistent to him.
He had originally thought that the Shura Potion would bring some adverse effects, but now it seemed that it hadn't harmed his body in the least.
Instead, his untouched limit for so long had increased by 5 beats!
