The next issue is all the objects a player might control, but doesn't own
This has given rise to multiple of the best cards the game has to offer, like Force of Will, Force of Negation, the Evoke Elementals and more
As such the option to discard it was always interesting, it would allow for much more immediate and mana efficient card draw but it would significantly reduce the overall value
Now, another special treatment has multiple different MTG cards spiking in price
The internet is still debating whether Massacre Wurm's smiling or not, though a bundle of joy like that
However, there are more efficient mill cards such as Mind Funeral or Glimpse the Unthinkable that can mill more cards for a similar mana cost, making Traumatize less optimal for competitive play unless in a specific strategy