Winchester Boat can only attack players with dread counters on them, and whenever it deals combat damage to a player, exile it at the next end step.

Players cannot win the game.

Whenever a player would lose the game, instead their life total becomes 1, they get a dread counter, and put a dread counter on this artifact.

As long as four or more dread counters are on Winchester Boat, it becomes a creature with infect in addtion to its other types.