Rules glossary
↑ Parent rule: 602.1 Activated abilities have a cost and an effect. They are writ…
602.1a The activation cost is everything before the colon (:). An ability’s activation cost must be paid by the player who is activating it. Example: The activation cost of an ability that reads “{2}, {T}: You gain 1 life” is two mana of any type plus tapping the permanent that has the ability.
No sub-rules.