Seriosly, izzit after casting it will increase the intellegence or mana directly?? coz after i cast and compare the intellgence before i cast it's still the same, so got any clue tat for what kind of use??

It should increase Intelligence level. It works for me.
Maybe, you have to spend on it some more skill point in order to see some modification.

hmm, ok maybe should be like tat ^^ but nw i change job to paladin ^^