Dry Spring

Regular 
Dries and blocks the water flow within a spring, reducing its output.

Duration: Permanent. Note, however, that the local geology may eventually shift, restoring the spring’s output to its previous level. 
Cost: 3 times the reduction in the spring’s output, in gallons per hour. 
Time to cast: 1 minute. 
Prerequisites: Destroy Water and Shape Earth.

Item 
Staff.  
Cost to create: 450 energy and a $500 emerald.