Black crystal/ dark crystal

For maker, the refined and graded version of these:
Black deviates Attack, but dark deviates stats correct? or do they do the same things? Thanks =P

i just don't have the funds or time to try this out right now =x
don't wanna make a mistake putting a random one that won't work xD

Believe it was:

Black: Attack, M.Att, Jump, Speed, HP, MP, Accuracy
Dark: Str, Dex, Int, Luk