His Attacks were followed by another giant sword which caused 300% damage. This meant this monster would lose 800% damage per hit, that of course if it was a normal damage.
If it was critical damage then this loss would double. What made this monster more miserable was Ibro's trump card: Absolute Sword passive skill. Each hit was neglecting this monster's defense.
In less than 1 minute, this monster had lost more than 11 million damage. What added to this huge damage was the rise of Ibro's sword to level10. That made him gain 450% addition to Strength basic attributes.
Ibro's casual hit during this minute was 132k and his critical hit was 264k. That monster total HP after Ibro's skills was less than 20 million.
Ibro didn't slack and continued to hit this monster relentlessly for the next 4 minutes. He caused nearly 8million damage during these minutes. Just as that monster was about to regain its freedom, Ibro threw another Odd rune directly to its face.