Rules glossary
↑ Parent rule: 602.1 Activated abilities have a cost and an effect. They are writ…
602.1e If a spell or ability that refers to the “activation cost” of an ability modifies how a player may pay that cost, that modification applies to the total cost of that ability, even if that cost is increased and/or decreased by other effects. See rules 602.2b and 601.2f.
No sub-rules.