Historical Rules · 8 June 2018
Rule 701.9f
Official source text from the 8 June 2018 Rules release
To double the amount of a type of mana in a player’s mana pool, that player adds an amount of mana of that type equal to the amount they already have.
Historical Rules · 8 June 2018
Official source text from the 8 June 2018 Rules release
To double the amount of a type of mana in a player’s mana pool, that player adds an amount of mana of that type equal to the amount they already have.