For "magical" people. If you want to throw a spell at someone or something.
Example : invoke 'blade of shivering ice' {player} Note that the name of the spell must be enclosed by " ' "s.
There are two modifiers that can be used with the invoke command:
-novoice -nogesture
-novoice means you will not be seen to utter the spell
-nogesture means you will not make gestures when casting
each of the options adds to the difficulty of casting the spell.
If you are underwater and not able to breath water you will automatically cast spells with -novoice and incur the penalty. Similarly if for any reason you cannot speak - e.g. you have something in your mouth they you againincur the -novoice penalty.
If you are underwater and do not have 'free action' then you will automatically cast with -nogesture and incure the casting penalty. The same is true if you try to cast whilst holding something or wielding a twohanded weapon or wielding two weapons - i.e. you must have at least 1 hand free to cast without the -nogesture penalty.
There will be times when casting without these option could cause you to be attacked.