Apply these game effects whenever a Mold token (be it Active or Inactive) is set in a Zone, turning it into a Mold Zone.
Mold General Rules
Remove any Objective and Door tokens in the Zone. They cannot be recovered. Look at Objective tokens removed this way: the Mission may already be lost!
All walls in the Zone, except the ones leading to exterior Zones, are considered as having an opening.
The Zone cannot be Searched and loses its special properties. For example, Oxygen Supply Rooms (P. 35) disappear and cannot provide Oxygen Tanks. Airlocks can still be used to go to exterior Zones.
Active Mold Specific Rules
The Zone is considered as a room Zone to trace Lines of Sight (P. 11). It cannot be Searched (P. 22).
Hellfire (P. 34) flips an Active Mold token to its Inactive side.
The game is lost as soon as 2 (or more) Spawn Zones are linked by an uninterrupted chain of Active Mold Zones (diagonals don’t count).
Inactive Mold Specific Rules
The Zone is considered to be a corridor Zone to trace Lines of Sight (P. 11). It cannot be Searched (P. 22).
The presence of a Spoiler Abomination in the Zone flips the Inactive Mold token to its Active side.
Inactive Mold Zones are not counted in Mold chains to determine whether the game is lost.