Have you ever wanted to create a horde of creatures, watch the dread in your opponents eyes as they realize nobody at the table is holding a board wipe, then swing with dozens of attackers to take them all out simultaneously in a game of Magic: the Gathering (MTG)
Still, casting a turn 3 Tibalt, Cosmic Impostor is a dream very few people have accomplished
That being said, I think the reasons for a card being banned can be broken down into two main categories: A card is too powerful on its own and almost every deck has to have it to be good
Exdeath, Void Warlock / Neo Exdeath, Dimensions End Exdeath, Void Warlock has a transform condition thats pretty easy to meet, which is good because the cards power rests in Neo Exdeath, Dimension's Enda card that has my vote for Magic card that looks most like it came from Yu-Gi-Oh
This is one last go, for old time's sake, one last big job before I retire, like Robert De Niro in Heat