Change to Maru-yu Beam Variant of "Change to Mutsu Beam" except Maru-yu doesn't have the same construction time as any other ship so there's no disappointment from wanting a rarer sister ship. Maru-yu is also not very common and is the only ship that can be used to augment the luck stat, so this beam is more of a blessing than a curse. See also:Change to Zuikaku Beam