My character is a rogue and a member of the Szarni. Since I want to role play a con artist who tells false fortunes and cons the crap out of people, I was going to take a level as an Oracle (it works even better because he's a half elf). I wanted to take a curse, even though I don't have an Oracle level. It only makes sense to me, as he was born with the curse. It would be an extra challenge, but is it legal?