Dont expect serious decks and competitive play
Whenever you draw a card with Maleficent, Mistress of All Evil in play, you can transfer damage from a chosen character to an opposing one
Similarly, giving other cards shroud protects them, but you only need to do that once
Ancient Ziggurat comes in handy except when I draw non creatures, then I'm screaming at myself for having it
Nekusar, the Mindrazer punishes opponents for drawing cards, dealing 7 damage per wheel
In comparison to the other most played discard spell in Modern, IoK does not make you lose life, so it is one of the best cards against aggressive decks like Burn