Historical Rules · 17 April 2026
Rule 700.5
Official source text from the 17 April 2026 Rules release
A player’s devotion to [color] is equal to the number of mana symbols of that color among the mana costs of permanents that player controls. A player’s devotion to [color 1] and [color 2] is equal to the number of mana symbols among the mana costs of permanents that player controls that are [color 1], [color 2], or both colors.