This is the first time Barktooth Warbeard has ever been reprinted since its debut in 1994's Legends set, and there's a good reason for that: it's kind of pants
Aminatou effectively gives miracle to enchantments as you draw them
They have 12 or 13 cards instead of 15, and their card distribution is pretty complicated: 1 art card (5% chance of a signature variant) 1 land (15% chance of a foil land) 6 connected cards 35% chance of 5 commons, 1 uncommons 40% chance of 4 commons, 2 uncommon 12.5% chance of 3 commons, 3 uncommons 7% chance of 2 commons, 4 uncommons 3.5% chance of 1 common, 5 uncommons 2% chance of 6 uncommon 1 showcase variant 2 wildcards of any rarity 49% chance of 2 commons 24.5% chance of 1 common, 1 uncommon 17.5% chance of 1 common, 1 rare/mythic 3.1% chance of 2 uncommon 4.3% chance of 1 uncommon, 1 rare/mythic 2.6% chance of 2 rare/mythics 1 rare/mythic 1 foil of any rarity 1 token/ad card with a chance of being a card from The List You basically sacrifice the boosters ability to be used in a Draft for a chance at multiple rares

Its just cheap enough to be playable when you need it in aggressive games, and also allows you to play counterspells or whatever else you want later on without requiring a hefty mana base
These are often run as Sealed events and let you experience a brand-new set ahead of its official tabletop release
In Commander play, this is a nothing payment