1 Common Ground
To play this event, you must command three personnel. Starting with the player to your left, each player may place a personnel from hand on a headquarters mission where that personnel could be played. (Yours must be a personnel.) Destroy this event.
"It was our hope that you would have to come together in fellowship and companionship to hear this message."
2 R 35

Legal Card Pools: Complete Traditional Virtual Academy Excelsior Hall of Fame
Legal Rules Sets: Standard Slipstream

Image Source: The Next Generation: "The Chase"

Related Rulings:
Substituting for a Headquarters