What is up with the way defense increases now?

Every time I level up, I gain more defense. I'm not entirely sure if this is coming from the level-up or the luck I'm adding. What gives defense now? o_o

I know STR gives 1.2 defense per point or so. Are you a STR Shadower by chance?

Oh here we go, courtesy of Fiel:

WDEF = STR * 1.2 + (DEX + LUK) * 0.5 + INT * 0.4

So each point of LUK be giving you 0.5 points of defense.

Oh, cool. Thanks.