The Storm

The Storm is an event which occurs every seventh night. During the day (and night) of the seventh day, Greater Mobs have a drastically increased chance of spawning.

There is a yet-to-be-revealed plot reason into why the storm appears, and with it brings more powerful mobs.

The Day of the Storm
Once night begins, a thunderstorm will begin, lasting until the morning. During the entire day and night of the storm day Greater Mobs have a 20% chance of spawning (in comparison to the 2.5% chance otherwise).

The Day of Relief
This is the day that occurs the morning after the day of the storm. The storm will clear, and for the next day, the spawn chance for Greater Mobs is reduced to 1.25%.