Item that reduces max SP

[hachface]

I'm new at RMXP. Is there an easy way to make it so that whenever a character equips a certain accessory, her max SP will be either be reduced to one fifth, or to twice her current level (whichever is higher). I tried a simple (ha ha) script using a "while" and "until" loop, but I don't think I know how to use $game_actors correctly. Also, I think this can be done just using events--although I'm not adverse to scripting.

Any ideas?

 

[So fist]

Note that this is theoretical.  I did not test this, but this should be easily done with events.  We'll need a common event that collects the variables necessary and the sp multiplier of the item:

#These are our major variables
control variables [character 1 sp] == char1 sp

#Here's our fraction
control variables [numerator] == 1
control variables [denominator] == 5

now we will need a conditional branch for the action to occur:

conditional branch: [char1] is [sp draining item] equipped
#here we make our fraction dividing our numerator into our denominator
control variables [numerator] /= [denominator]

#Now we multiply our char sp by our new number
control variables [character 1 sp] *= [numerator]

#now we change the parameter by subtracting from the character's sp with our new variable
change parameters: [char1], [MaxSP] - variable [character 1 sp]

That's a good start for you.  You will likely need to have a good else statement that restores your character back to normal else the reduction will be permanent.