Complex sentence: Finally, after facing much danger, the party discovers the location of the Adamantium Heart, only to have it stolen away by an evil sorceress, Countess Malgorra del Incendio, who plans to use the stone to bring a great evil into the world.
Split into simpler sentences: Finally, after facing much danger, the party discovers the location of the Adamantium Heart, only to have it stolen away by an evil sorceress named Malgorra. Her goal is no less than to use the stone to bring a great evil into the world.