This a sealed The Brothers’ War Draft Booster Box released by Magic the Gathering.
The Brothers’ War Draft Booster Box contains 36 The Brothers’ War Draft Boosters.
 
Each Draft Booster contains 15 cards and 1 token/ad card, including 1 card of rarity Rare or higher, 1 card of rarity Uncommon or higher, 3 Uncommon cards, and 10 Common cards. Traditional Foil Borderless Mythic Planeswalker in less than 1% of boosters. Land card replaces a Common in 25% of boosters. Traditional Foil of any rarity replaces a Common in 33% of boosters.
Contents:
36 The Brothers’ War MTG Draft Boosters
15 Magic cards per booster
At least 1 card of rarity Rare or higher in every pack
1 Traditional Foil card in 33% of packs