It would be nice to post a little more info, for example which file?
Here is a short list of cards that give you a nice amount of SP:
Caith Sith - works only if your refess level is 5 or above, gives you a total of +3SP
Witch, Magic Doll -Mini-, Mermaid Priestess... - standard +2SP soul skills, you have them in the starter too
Priest of Madneess - gives you +3SP, but requires a good timing