Format:
cast 'earthquake'                       cost: 15 mana
cast 'firefield'                        cost: 20 mana 
cast 'blizzard'                         cost: 18 mana

   The above spells are area affect combative spells, and while they do not
harm other players, they do target every mob in the room.

Earthquake may only be cast while on the ground.  It cannot be cast while in
the air, and due to the dampening nature of water is has little to no effect
when cast above water (from inside a boat for example).

Blizzard must be cast in view of the sky.

None of these spells may be cast underwater, for obvious reasons.