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The flight mechanic has been changed so that to enter an object, you must first "land," i.e., stand on an empty cell next to the object. If there is no such empty cell, you cannot enter the object. This was done to ensure that it is impossible to visit objects without bypassing the guards, and to eliminate this unwritten rule (considering that the guards may apply to a large number of objects, and some objects may not be near them at all). Of the various options for achieving this effect, the chosen one is close enough to the original game mechanic (in the original, a similar mechanic works when entering a town in flight), it is not too complicated, and yet it does not significantly change the gameplay, only in the details.