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Keywords are:  'firefighter bonus class ventilate extinguish berm'

The firefighter class is a bonus class available during certain Summer
Solstice Celebrations.  It is suited for helping suppress fires and
other natural disasters associated with volcanic eruptions.

It has three levels.  Each level unlocks a spell that will aid in
completing the summer event area:

Level 1 - 'extinguish' - This generates a spray of water, useful
for putting out fires.  It lacks the finesse of the 'create water' spell,
and cannot be used to fill containers.

Level 2 - 'berm' - The 'berm' spell raises up a rounded barrier
of earth, tall enough to contain most creatures, wildfires, and even
hot lava (for a time).  The spell does not last long, however.

Level 3 - 'ventilate' - This spell was developed to quickly
clear away smoke and poisonous gases, blasting pollutants into the
sky where they harmlessly dissipate.  It can also dispel certain
spells.