Historical Rules · 22 July 2016
Rule 605.3c
Official source text from the 22 July 2016 Rules release
Once a player begins to activate a mana ability, that ability can’t be activated again until it has resolved.
Historical Rules · 22 July 2016
Official source text from the 22 July 2016 Rules release
Once a player begins to activate a mana ability, that ability can’t be activated again until it has resolved.