Quick question about Wheel of Time I just finished book 3, and I am baffled at how the next 11 books are going to play out. Rand already got Callandor, which seems to make him ridiculously OP and basically invincible. It seems to me that this would completely rob the series of tension, and make every other character completely useless by comparison. Is this a problem in the series going forward, or I am worried for nothing?