One game you could hit the best spells and draw archenemy instantly or you hit nothing and everyone cries from laughter that you sunk three mana into this
Its even better when many such cards can make their home in your Command Zone, approximately doubling the threat level of their explosively-growing statline: Korvold, Fae-Cursed King Mazirek, Kraul Death Priest Kresh the Bloodbraided Juri, Master of the Revue Grismold, the Dreadsower Of course, that doesnt even get into all the ways other sacrifice commanders like Syr Konrad, the Grim or Meren of Clan Nel Toth are able to profit off the ebb and flow of the battlefield
Then Delta Species Pokemon appeared with types they werent naturally born with
This card was so heavily played, that I ran False Cure to kill someone who used it
Incremental Blight can outright kill three creatures or severely weaken them
It requires some dedicated support to get it out early, thanks to its eight mana cost, but once its out there, the opponents will have a hard time dislodging it