Rule 377

Activated Abilities are repeatable effects with a cost. They follow a process of going onto the chain and resolving, similar to Playing a Card. See rule 349. Playing Cards for more information.

• 377.1 Activated Abilities are recognized by the presence of a ":" in the text of the card, preceded by a cost and succeeded…
• 377.2 Card text will refer to activating Activated Abilities with the word “use” or “play.”
• 377.3 Activated Abilities use the chain.

Official Core Rules