Historical Rules · 17 June 2011
Rule 605.5
Official source text from the 17 June 2011 Rules release
Abilities that don't meet the criteria specified in rules 605.1ab and spells aren't mana abilities.
Historical Rules · 17 June 2011
Official source text from the 17 June 2011 Rules release
Abilities that don't meet the criteria specified in rules 605.1ab and spells aren't mana abilities.