Complex sentence: Having Arab blood in her veins, she possesses some of the secrets of Arabian magic, but her incautious use of her magic arts brings her into the dungeons of the Inquisition at Goa.
Split into simpler sentences: Having Arab blood in her veins, she possesses some of the secrets of Arabian magic. However by incautiously practising her magic arts she is brought into the dungeons of the Inquisition at Goa.