Historical Rules · 11 November 2016
Rule 905.1a
Official source text from the 11 November 2016 Rules release
A draft typically consists of three draft rounds. In each draft round, each player opens a booster pack, drafts one card by placing that card in a face-down pile in front of the player, then passes the remaining cards to the next player. Each player then drafts a card from the booster pack passed to him or her and passes the remaining cards. This procedure continues until all cards in that draft round have been drafted.