yu gi oh egyptian god deck slifer the sky dragon 3x Deck: From the Legendary Decks II set Thunderforce Attack

In past formats, running cards like this was usually frowned upon

I can see this card going absolutely insane in decks with a lot of enters-the-battlefield triggers based around creatures

Although you have fewer cards which trigger it compared to Kiora, the card is cheaper and therefore easier to sneak under counterspells, it replaces itself, and it triggers on cast rather than when a creature enters the battlefield, meaning your draw is nearly guaranteed

Once you hit 14 cards in the yard, it transforms into Hades, Sorcerer of Eld, which lets you play from the graveyard

Not only is availability a problem, but centering is also another massive hurdle