Historical Rules · 7 October 2022
Rule 500.4
Official source text from the 7 October 2022 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 · 7 October 2022
Official source text from the 7 October 2022 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.