In LW3 episodes "Rising Flames" and "A Crack in the Ice" we saw the minions of Primordus and Jormag, respectively, be tainted with the magics of Zhaitan and Mordremoth. Then, at the end of LW4, we see Kralkatorrik go mad and be at war with himself because of all the extra magics he absorbed: Zhaitan, Mordremoth, Balthazar and we learn from Aurene during "War Eternal" that the elder dragons weren't meant to contain those other magics; that they could only handle the magics in their respective domains and that Aurene was the "first of her kind" being a dragon that COULD contain all the magics in one.
So why aren't Jormag and Primordus and water dragon all going insane like Kralk did? Also, why do we no longer see their minions tainted by the other magics? It's not like those other magics just ceased to exist. Yes, Aurene is now an elder dragon and the nexus for those other magics, but until that happened, the other magics had no direction and were being absorbed by the still living dragons, hence the tainting of their minions. So why didn't they go mad like Kralk and why are their minions not still tainted?