User blog comment:13SIlent/Monster Lord/@comment-24439699-20140214071148/@comment-24439699-20140214191426

thats the iiffy part. From what we know, she already had darkness after she sealed the 1st. But something happened, or she could not fully control the balance, so she needed the eighth, thats what the game likes to forget. Illias was doing the balance untill the eight came for darkness.