Similarly to the question How would it make sense that spellbooks or grimoires teach only one spell? I was thinking about typical RPG games and how to design the magic system therein.
While thinking about this topic I came across the fact that weapons enhance abilities. For most weapons and your normal Fighter-type characters this makes a lot of sense to me. Of course it would be easier to fight with a sword made of material that is able to withstand more and of course the sharpened tip of a spear is better than the old dull one. A well-balanced weapon is easier to handle and reducing the weight would increase the speed with which you could handle the weapon.
But why would a staff increase the magical abilities of my mage?
Weapons are supposed to increase a characters stats as a simulation of increasing their combat performance. But most of the time magical attack power is a stat, too. And it gets increased like every other stat by equipping a better weapon, most often a staff.
In my world magic is supposed to be the typical high-fantasy kind of magic for the normally rare magic users:
- you have a mana pool that you use to cast spells
- you learn spells through experience and on special occasions, such as reading a grimoire
- you can throw around fireballs, create walls of earth, fly through the sky, ...
- your spells do more damage the more you know about magic and how to use it efficiently - represented by a stat like Intelligence
- your equipped staff increases your magical attack power
I am looking for a sensible in-universe explanation as to why a staff would increase my magical attack power. This should have an analogue in real weapon usage that is represented by a set of stats as you see in most RPG games, which are increased when equipping a better weapon.
I just don't know why a staff would have any impact on for example my mental stats, such as Intelligence, or Magical Attack Power, or any other specific name you might want to use that I would be able to explain the increase in magical power by equipping a better staff. This also means I don't know how to narrate what a better staff is. Is it lighter? Heavier? Fancier? Mundane?