Those are both ideas that can be used in interesting ways, but what
really matters is what is behind them? If the plague simply pops up
now and then it cannot be stopped.
If that is the case then you are treading a fine line between adding
spice to the world, and tormenting the players for your own amusement.
The same mostly applies to food shortages, if then happen because of
something the players can prevent then it can add drama. Players pretty
much always explore and look for new areas, but if the orcs block the
river it gives them a cause to fight for.
A.T
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