370.2. Activated Abilities use the chain.
370.2.a. Declare activation of the Ability.
370.2.a.1. The ability goes on the chain but has no card to represent it, so players need to take note that it is now a Closed State.
370.2.b. Proceed with executing the Chain.
370.2.b.1. Follow the steps of “Playing or Activating Abilities” in rule 386 . This ability will become a Pending Chain Item.
370.2.b.2. Opponents have an opportunity to respond, as appropriate, as if a card was played onto the chain.
370.2.b.3. If no further action is taken, execute the Activated Ability.