Historical Rules · 26 September 2015
Rule 703.4p
Official source text from the 26 September 2015 Rules release
When each step or phase ends, any unused mana left in a player’s mana pool empties. See rule 500.4.
Historical Rules · 26 September 2015
Official source text from the 26 September 2015 Rules release
When each step or phase ends, any unused mana left in a player’s mana pool empties. See rule 500.4.