tukutu

Hi, today I was searching the internet, some forums and the wiki of metin2 about the dark protection ability of the black magic sura,
 according to the description of the skill reduces a% of the magic damage. 
In my case according to the ability it says that I reduce 112% of the magic damage received,
 but in the wiki it says that: - The reduction of the damage of the dark protection is always 33%, that is 1/3 of the damage ..

This means that if a skill removed 9k without dark protection, with dark protection it would remove 6k.

Could someone tell me how this skill works specifically? If the damage reduction is always 33% or can it be increased in some way?

Thank you.