While Magic's history stretches back 30 years, the lore of Dominaria itself is much longer. Returning to a pivotal story of Dominaria's—and Magic's—history, what started as a feud between Urza and Mishra erupted into an all-out war that set into motion the future of the plane and Multiverse itself.

Set Boosters are the best Magic: The Gathering boosters to open just for fun. Each The Brothers' War Set Booster contains 12 Magic cards, 1 Art Card, and 1 token, ad card, or special card from Magic's history (a card from "The List"). Each pack contains a combination of 1–5 card(s) of rarity Rare or higher and 3–7 Uncommon, 3–6 Common, and 1 Land cards. Traditional Foil Land replaces basic land in 20% of Set Boosters. Foil-Stamped Signature Art Card replaces Art Card in 10% of Set Boosters.