Yes that's probably a terrible title but since you are her it work't.

So i wanne know what the effect is of me shooting a fireball into the air.

when I shoot a fireball save my game and reload the save the fireball is still there, that means its data is present in the save game, so if I where to shoot 99999^999 fireballs into the air would that cause my save game to grow in size? will this cause performance issues since it has to keep calculating each and every fireball movements? or is there a limit to how many there are or how far the can go?

Please enlighten me and discuss.

Thank You

Ranged spells have a limited range, and then they'll dissipate. Frost and Shock spells have even shorter ranges. You don't have to worry about anything.