Tactical Airlift
This is a potential option to add to existing airlift parameters (like how long a diplomacy lasts etc.)
The card setting would allow airlifts to be scheduled just like other orders during the turn.
If the target territory has been captured during the turn, all troops are lost. If the airlifting troops are eliminated before the card is activated, then card is lost.
Another idea for "tactical capability activation" could be the compounding of cards (save them up). So playing whatever number of cards together allows the option. But, this way, you are less sure if the enemy currently has the capacity.
It would make for some crazy play :)