A M is a special type of upgrade card with the M icon on its card back and upgrade icon in the lower-left corner of the card front.
- A M can be equipped to any ship that has the M upgrade icon in its ship card.
- Only one M card of the same type can be in play for that fleet (or allied fleets in team play), if this M is discarded during play, it cannot be equipped by any other ship in that fleet, such as Chimaera.
- If a M has an effect that triggers at the start of a phase, that card's effect will persist until the end of the round, even if the ship that card is equipped to is destroyed, or if that card is discarded by some other effect.










