The Power of the Wise - S1.E8

While on a quest for Merklynn, Leoric confesses that he fears Darkstorm's magic power of decay the most. As Darkstorm learns about this the Darkling Lords spring a trap on the Spectral Knights. Darkstorm unleashes his power of decay, and turns Leoric into an old man. Their only hope lie on the Eternal Spring, the only way to reverse the power of decay.