"Just now, Rein's 'Strength Burst' duration had ended."
"As a result, his body shrank back from 'Schwarzenegger' size to an average build."
*Since it was his first time using this new skill, Rein realized he had greatly underestimated its 'side effects.'*
*At this moment, he felt an unbearable soreness in all his muscles. If he wasn't careful, he might've faltered while standing.*
*No wonder the notes on the panel mentioned that further upgrades were impossible at this stage.*
*If he forced an upgrade, sure, it'd be powerful enough—but as soon as the duration ended, the 'side effects' might be fatal on the spot!*
"However, after thinking it through, Rein quickly connected the dots. It likely had more to do with his currently low Constitution."
"Strength Burst gave him 20 points of Strength, but his body had only 9 points of Constitution for support."
"It was like a pony trying to pull a cart—it's bound to be too much!"