A few of use had this idea that all types of purple stuff should spread much like the grass on minecraft except on a conntact basis. but instead of just a top layer it transformes the block its "infecting" into the purple stuff, for obvious reasons the spread shouldnt be very fast so you can counter it by removing the infected blocks, however if neglected it will continue to infect the rest of the ship. this could be a whole new faction/enemy that would provide another elemnt to the game it would then become more like a species/bacteria to fight off.