Q: Must attaching Creepers be attached at the first available opportunity, or only are they only attachable when first played?

For example, if an attaching Creeper is played when there is no appropriate Keeper to attach to, does it stay unattached forever (or until the Action Creeper Reassignment is played), or does it attach to the next available Keeper which accompanies it in play? In other words, does it only attach if there are (appropriate) Keepers in play when it goes down on the table, or will it attach to Keepers played later?

A: The text on attaching Creepers states “If you have any [appropriate Keepers] in play, you much choose one to attach this to.” This property is not limited to the moment when the Creeper is first played. If there is no appropriate Keeper to attach to when it is played, it will attach to the first appropriate Keeper that arrives.