Using your absurd amount of mana, you can force each of your opponents to draw out their deck and lose the game
There are over 200 cards to collect in The First Chapter, and there are foil variants of cards as well for players and collectors to keep an eye out for
Only then would there be high confidence in which targets would be safe to buy into
If you already play Footbottom Feast to rebuy creatures at Instant speed this is the same thing for artifacts
It's certainly a powerful spell if you have other ways of dealing your opponents mill, or as I like to call it, "deck damage." You can pair this with cards like Deadly Cover-Up and Space-Time Anomaly, assuming you can survive to those turns in the game
However, Ajani, Unyielding provides more than enough value from his +1 and -2 loyalty abilities alone, and this ultimate trigger is better viewed as a bit of available icing for super friends decks or other wonky shenanigans.