How should substitution, and projectile weapons in general work in a MMO Naruto game. I was thinking something along the lines of you press a button to increase a variable and when hit this variable would go down preventing taking damage-susbstition. Projectiles in Naruto games tend to be unlimited not sure if this is the route one should go though. Should their be a skill for the amount thrown at one time or should it be static increasing skill that improves number thrown and or quantity held.