Having a limitation on magic is exactly the same as a limitation in physical feats. It's why a lot of HURR HURR hulking sword rapists have Mana Bars as well, except that it's called Stamina. It's really that simple. Magic, in almost every setting, is something that runs through your veins and you tap into it. But like thinking or working too hard, eventually, the body tires, and you're left exhausted.
Having so many spells a day is also a matter of the same sort of stamina balance. Using Gandalf as an example is pretty poor, since his spells in the Lord of the Rings trilogy are pretty crap. His best use of magic is bringing the sun out early in The Hobbit. But that was one big spell. Most of the other stuff is talking to animals, which any retarded ranger can do, and use magical devices, specifically swords. ORCHRIST. THE FOE HAMMER. NOOOOOOooooooo-dead-
It comes down to, from a gameplay perspective, balance. A lack of balance makes a spell chugging kill crazy gaggle of fuckheaded douchebaggery. See : Kratos. And from a logical perspective, eventually, one tuckers out, and just can't keep RENDING DAH URFF after so many spells. Even simple things require unreal concentration to successfully pull off.
Having so many spells a day is also a matter of the same sort of stamina balance. Using Gandalf as an example is pretty poor, since his spells in the Lord of the Rings trilogy are pretty crap. His best use of magic is bringing the sun out early in The Hobbit. But that was one big spell. Most of the other stuff is talking to animals, which any retarded ranger can do, and use magical devices, specifically swords. ORCHRIST. THE FOE HAMMER. NOOOOOOooooooo-dead-
It comes down to, from a gameplay perspective, balance. A lack of balance makes a spell chugging kill crazy gaggle of fuckheaded douchebaggery. See : Kratos. And from a logical perspective, eventually, one tuckers out, and just can't keep RENDING DAH URFF after so many spells. Even simple things require unreal concentration to successfully pull off.