The trumpet sounds and the whole line steps off: every one of your pawns with an empty square ahead advances one square. Pawns one step from the last rank hold their ground.
You draft Muster the Ranks in Buff mode. Instant: it takes effect the moment you draft it.
As a movement card, it changes how one of your pieces is allowed to move.
“The muster roll fills out fast.”
Needs one of your pawns in play.