I had a character explain the spell slot system. She said her lifeforce was like a river, constantly eroding its banks.
New channels could be opened up, but only a limited amount of power could go through them before they dried up. The more often a channel was used, the wider it would get, and the more power could pass through it at once.
In other words, higher level spell slots are older slots that have been used repeatedly, while low level slots are newer and thus weaker. I had ideas for everyone basically using a different metaphor for the same concept, but I never got around to it.
That made some sense but also it doesn't. I get the "growth" on the hole the more you use it, but doesn't that mean that eventually, all holes just expand to the supposed limits?
I think the most I often see are nodes, opening channels for higher access of power.
Are you using 3.5 slots? If so, you can forego the use of 'slots' or nodes, and instead just describe it as a single object (the soul?) that gets engraved with spells. The stronger the object, the more and the stronger the spells that can be engraved on it. Once a spell is used, the engraving fades and has to be reapplied (during a rest).
Yeah, but I want to limit the written wizards to handful of powerful spells, MC included so that he don't go and spam Nuke whenever he has the power to.
That is the difference between slot system and point system.
... I need to go check on the different editions of slots.
What I envisioned is preselected bullets (analogy, not actual rounds) to be fired and only in resting can the bullets be refilled and swapped.
Yeah, that's pretty much how 3.5 works. You rest for 8 hours, then spend an hour preparing specific spells. Certain feats can change that, and I think sorcerer does it slightly differently of course.
What is the difference between 3.5 and 5e? Skimming through the roll20 guide, I am seeing that the wizard just commit the spell into memory. That's it, no mentioning of how the spell slots are formed.
The main difference between 3.5 and 5e wizards is that in 3.5, you prepare spells in the spell slots, while 5e wizards prepare the spells and then spend slots like mana points to use them.
A 3.5 wizard says, "okay, I have two copies of magic missile and one copy of shield prepared."
A 5e wizard says, "okay, I have magic missile and shield prepared. I can cast each spell twice, or both spells once."
Well, sometimes yes. However, some spells have situational value. That's why you prepare different spells every day, and especially when you know what you might encounter. Maybe you have a generic loadout for everyday use, maybe you grab illusions and charm spells for talking, maybe you know you need something dead and take ten copies of fireball.
The reason for spell slots is game balance. Though, spellcasters tend to be on the weaker side at low levels. At high levels they are OP, so they need some limiting.