The idea behind the prerequisites is that you need a certain level of natural aptitude for the class in order to be able to branch out effectively, on the fly as an adventurer - so if you aren't meeting the prerequisites for your main class, it's an indication that you really need to work hard to be good at your class, to counteract your low aptitude for it, and so don't have the time and space to pick up something new as well. The wizard that only has 12 Int really needs to *focus* on being a wizard to even maintain their current wizard level, and can't really dedicate any focus to learning how to be a fighter, even. That's the concept at least. (mechanically, it's a caveat that exists to close a balance loophole, without forcing them to put stat requisites on your first class at character creation)

Just as an addendum: I know you mentioned this, Melivy, but it often still causes confusions. When you multiclass spellcasters, and derive your number of spell slots by adding the levels of your full casters, half your half casters, and a third of your tertiary caster levels, this can give you higher level spell slots than spells that you can cast; this is normal and correct. If you are a level 9 Cleric and level 9 Wizard, you will have spell slots all the way up to 9th level... but your individual casting classes will each only have access to 5th level spells; even though you have 6th, 7th, 8th and 9th level spell slots, you cannot learn or prepare any spells above 5th level at all. You can still use those higher level slots to upcast your other spells though - a 9th level hold monster will let you paralyse five targets at once, for example.

Last edited by Niara; 24/01/23 11:34 PM.