Complex sentence: The added moving capability provided by a plundered vest may be used one time only on any future move: i.e., the plundered vest may be used on its very next move or carried around and used later in the game.
Split into simpler sentences: The added moving capability provided by a plundered vest may be used one time only on any future move. I.e. the plundered vest may be used on its very next move or carried around and used later in the game.