A ghost ship sails a chosen file from your back rank, one square per your turn for 6 turns, passing through everything: any enemy piece except a king on the square it crosses is frozen for 1 turn.
You draft Ghost Ship in Buff mode. Activated: you choose when to use it, and using it is your move for that turn.
As a tempo card, it buys time: an extra move, a skip, or a freeze.
“Fog first, then rigging, then regret.”