What resources are used by this spell?

[Xenosys]

Hi, didnt really know where to put this question, its a little abstract. im trying to work out what files, in particular pixel shaders, that are used by a certain spell, that is, the invisibilty spell you get from invisibility potions. ive had a look through the MPQ's and my arcemu DB and i cant find anywhere where i could get this data, i cant even find the spells! could somebody point me in the right direction?

[Denial is Ok]

try looking in wowhead.com maybe