Once, one of your rooks may slide sideways along its rank passing through up to 1 friendly piece (never capturing them), landing beyond as normal.
You draft Rolling Gantry in Buff mode. Passive: it works on its own the whole time you hold it, with nothing to activate.
As a movement card, it changes how one of your pieces is allowed to move.
“It glides along the rails, straight through the scaffolding crew.”