QUOTE(JJ_Zalem @ Nov 10 2012, 16:42)

Spirit attack of Daimon (dark/soul) is Physical while Celestial and Fairy is Magical. Is there some kind of mistake or on purpose ? I don't want to waste crystals.
It's a roundabout buff to a few things (specifically, Celestials, Sprites and Light Armor). Heavy Armor stacks up high PMI but meh MMI, so powerful Celestial/Sprite skills are still potentially dangerous to Heavy Armor users. Meanwhile, Light Armor gets all sorts of Resist thrown at it whether it's Negation or not, which helps protect against that.
Celestials and Sprites have terribad Str/End, so to compensate they have very high power special attacks. Hitting MMI rather than PMI makes them a bit more dangerous.