If you've been spending any time in Yu-Gi-Oh circles (or any card game, really), you may have noticed a running joke where Pot of Greed or a card that draws two is mentioned, and someone else would ask "But what does it do?" or something similar
Theyre commonly faked, too, but if you pull an authentic one, they can be valuable
Eris, Roar of the Storm banned as commander
This is an entirely new world, where every time you play a spell, you draw a card, and then you draw another one on top of that once a turn when you cast your second spell specifically
Some of these abilities include creating a creature token, scrying a number of cards, drawing from your deck, or removing life from your opponent
They point to the Chronicles crash as a cautionary tale of what happens when that trust is broken