Madness is Contagious

Apparently the madness spreads .. not only rare cards like Enkil Cog .. or Summon History, common cards like Deep Song are affected as well. But at least there's some sort of explanation for this: Since Deep Songs are needed in higher quantities in deck than Summon History or Enkil Cog, more Deep Songs are sought after. And the smaller print runs of Keepers of Tradition and Heirs to the Blood didn't help either ...