In this article, we'll go through exactly what a Clue is, how it works in the rules, how it interacts with other cards and mechanics, and how we got from the investigate keyword in Shadows over Innistrad to the standalone Clues in Avatar: The Last Airbender
Funnily enough, the card was errata'd for years to implement this change
Plus, these decks usually have enough cantrips and card advantage to find the creatures that are important to the deck, so theres no much need to pack a bunch of creatures in the first place
People have mentioned that Etali is a worse version of Mind's Dilation, but I'd argue the opposite: the enchantment is getting you up to one spell each turn (possibly more if opponents are casting instants outside of their turn) and only from opponents, while Etali is getting all those spells at once and includes you
Thats a solid deal for a lifegain card, and it makes Case of the Uneaten Feast better than a lot of the 1-mana creature versions of this effect