Format:
cast 'fly' <target>                     cost: 25 mana

Fly is a spell which allows you to float above the ground. In this manner
you can enter "air-rooms" and walk across "water-rooms."  Fly also reduces
the amount of movement you use as you travel.

The fly spell is significantly less powerful than its' name implies.  It
should truly be named 'levitate', as it allows the target to float, but can
not lift the target far off the ground without external forces.