Rules glossary
↑ Parent rule: 117.1 Unless a spell or ability is instructing a player to take an…
117.1d A player may activate a mana ability whenever they have priority, whenever they are casting a spell or activating an ability that requires a mana payment, or whenever a rule or effect asks for a mana payment (even in the middle of casting or resolving a spell or activating or resolving an ability).
No sub-rules.