Historical Rules · 15 July 2011
Rule 500.4
Official source text from the 15 July 2011 Rules release
When a step or phase ends, any unused mana left in a player's mana pool empties. This turn- based action doesn't use the stack.
Historical Rules · 15 July 2011
Official source text from the 15 July 2011 Rules release
When a step or phase ends, any unused mana left in a player's mana pool empties. This turn- based action doesn't use the stack.