Magical Attack Textures?

I dont know how many people really play with Special Effects within blender but im wondering the process it would take to make a sort of magic attack fx, Not a fireball or something but I mean…
Like this: http://youtu.be/6-JBBTAwUtc
or
http://youtu.be/rh_1B7LqlnI

I realize I’d have to make the textures for the magic spells in gimp or photoshop (unless some wise ones know how to in blender lol)

Im not trying to rip off Makai Kingdom or .Hack but I want to use a different technique instead of Particles (they tend to kill my pc plus I cant export em to Unity)

Thanks for the heads up. If I need this to be posted somewhere else then please refer me where this should be posted o.o