Historical Rules · 7 February 2025
Rule 100.4
Official source text from the 7 February 2025 Rules release
Each player may also have a sideboard, which is a group of additional cards the player may use to modify their deck between games of a match.
Historical Rules · 7 February 2025
Official source text from the 7 February 2025 Rules release
Each player may also have a sideboard, which is a group of additional cards the player may use to modify their deck between games of a match.