Share Breath

You and your allies can share another's breath above the waves or below them.
Prerequisite: Prerequisite: The ability to breathe water
As an action, you can imbue an ally with the ability to breathe water. Your ally must remain within 10 feet of you. This ability persists until you revoke it as an action or until the creature moves farther from you than the above distance. If the ability ends while that creature is still underwater, it may begin to drown.