"A slight increase? How slight is it?"
Casio immediately commenced the test, curious to see how this first level skin hardening functioned. A dull thudding noise soon resonated within the secret room, lasting for a few minutes.
He drew an approximate conclusion.
In a normal state, when Casio did not intentionally exert force, the Stone Armor would amplify his defensive power four times. In a burst state, the Stone Armor could amplify Casio's defense by eighty percent, almost doubling it!
This was no trivial matter.
Knowing that, previously, an untrained Casio could withstand small firearms that only broke the skin, this boost of eighty percent meant that those small firearms may not even pierce his skin, and light machine guns and automatic rifles would likely pose no problem.
It was as if Casio wore a bulletproof vest anywhere and anytime.
Of course, skin hardening did not only offer bullet resistance.
