Is there a magic system like this
Lets say you want to make a generic fireball spell:
Elemental type attacks cost +10
Normal Damage cost +5
Requirement clap your hands 3 times -5
Requeriment tell your oponent that you are going to strike him with a fireball -5
so in the end the spell cost only 10 magic points
>>46786046
I think Age of Sigmar has rules much like that for some of their old characters.
BESM?
The Slayers D20 I think.
>>46786046
That reminds me of Oblivion's custom spell system, I think it works quite well
>>46786046
5 magic points my bad
>>46786046
>>46786046
M&M does that for basically everything. It's not limited to magic.
>>46786046
GURPS ritual path magic I believe
>>46786046
Mage
>>46786046
That's kinda how Mutant and masterminds powers work.
>Damage effect: 1p/rank
>Ranged: +1p/rank
>Burst Area: +1p/rank
Add up, 3 points per rank for throwing fireball.
Fire burst in an area around yourself or single-target fire arrow are 2p/r.
You can put Unreliable flaw for having only 5 clumps of bat guano on you at any time you go outside and have -1p/r to cost.
>>46786046
But why a packet of crisps?
>>46786046
GURPS can do this without much work, at least when talking about evocation like.
>1d6 burn damage; 5 energy
>area of effect, circular 3 hex wide.+100%
total: 10energy
>>46786046
Either GURPS or Anima is what you're looking for.