In the Guest where you have to protect the village frome the White Balvorine make sure that you know the will power "Summun" and when you go in to the Witchwood Lake to kill the White Balvorine when he's just about dead summun your creature from the Nether world and let it kill the White Balvorine so then you can summun a White Balvorine from now on. Dont worry the balvorine doesn't give you that much expirience points, so if u don't kill it your not missing much!