I'm thinking of creating an cantrip called mana bullet, similar in damage to fire bolt, that is made of pure mana - and as such is non-elemental, and can't be affected by elemental resistance. Of course, magic resistance still affects it. I'll lower the damage to balance out the fact that elemental resistance has no effect on it. I just wanted to know if such a thing is possible on a projectile spell of offensive nature.
What I mean by "projectile":
Fire bolt or fireball as well as magic stone are considered projectiles to me. My definition of "projectile" is basically the Skyrim definition. A projectile is simply an object that is launched in any way. Arrows, thrown rocks, fireball, all classify. Something like a summoning spell, vine whip, sprays or beams, are all not "launched".