Just now, Rein's "Strength Burst" duration ended.
So, his physique shrank from "Schwarzenegger" back to that of an ordinary person's.
Since it was his first time using this new skill, Rein realized he had underestimated the 'aftereffects'.
At this moment, his muscles were incredibly sore, and he almost lost his balance for a moment.
No wonder the panel notes said it was not to be further upgraded at this stage.
If he boosted it further, while it would certainly be strong, once the duration was up, the 'aftereffects' might just kill him on the spot!
However, Rein quickly thought that this was probably because his Constitution was too low.
His Strength surged to 20 points during the outburst, supported only by a Constitution of 9 points.
A small horse pulling a heavy cart is bound to struggle!
If his Constitution were higher, like 10 or 11 points, or even more, the effects of the 'aftereffects' would presumably be much more bearable.