The only downside is that the enemy will always know what you're building towards, but it also forces your opponent to deal with a Land, of all things
Each Set Booster contains 12 Magic cards, 1 Art Card, and 1 token/ad card, or card from The List (a special card from Magic's historyfound in 25% of packs), with a combination of 15 card(s) of rarity Rare or higher and 37 Uncommon, 36 Common, and 1 Land cards
Its set to release on August 22, so get a look at the full checklist ahead of its debut to get an idea of what kind of decks you might be building when its time to start playing
Additionally, it packs respectable survivability at 150 HP
In aggressive decks, its particularly useful before combat to shut down your opponents' potential tricksor just finish them off outright if you have enough mana