Historical Rules · 23 April 2010
Rule 605.5
Official source text from the 23 April 2010 Rules release
Abilities that don't meet the criteria specified in rules 605.1a-b and spells aren't mana abilities.
Historical Rules · 23 April 2010
Official source text from the 23 April 2010 Rules release
Abilities that don't meet the criteria specified in rules 605.1a-b and spells aren't mana abilities.