Everything You Need to Know About Play Boosters in MTG Draftsim Amazon.com: Four Knights: MTG TCG Starter Collection Commander EDH Booster Box 500+ Assorted Cards with Rares, Foils, and Mythic Compatible with Magic : Toys & Games I'm just curious: What is the record amount of rare or mythic rare cards that you've opened in a single Booster? I remember opening three rares in a Crimson Vow booster once, I'm just curious: What is the record amount of rare or mythic rare cards that you've opened in a single Booster? I remember opening three rares in a Crimson Vow booster once,