It says " Zarar Düşüşü 2% ".
Should be " Zarar düşüşü 33% " for every single " Dark shield " grade. From one point to Perfect Master.
Also there should be another text which is have to translated from " Reduction of the ammount of damage converted to SP consumption ".
In game, right now; the " Zarar düşüşü " text's " % " amount shows " Reduction of the ammount of damage converted to SP consumption " text's " % " amount.