There may be a copy of the newbie guide on the Ironsphere forums, but until it's found I can help.
#cast - usage: #cast spellname
Spells:
fireball
firebomb
thorn
icespike
hellstorm
dimensionrift
icestorm
ironfist
cloud
melt
powercloud
beam
Those aren't really in order, but just check each one to see the requirements for each one. To check them, type: #w spellname
I'll post again when I find a newbie guide. Maybe I should put one on my website under and information section or something.