Abilities design class in a clasic RPG

Hi there, first of all, what i mean by "clasic RPG" is something like final fantasy 1 2 3 etc, where in their battle system you had a simple menu with "Actions" or commands, and each command made a different move or action. Im struggling in how could i design these commands in a way that can be efficient and easy to manage.

What i first thought is make a base class for all abilities , and then make one class per ability ( of course that if 100 magics are the same in functionality, i would use that same class for everyone). But that left me with over 50 clases ( or even more in the future ) of abilities to manage, and didn't seem right to me. Then of course i could just make 4 o 5 classes for base abilities, i.e :

A magic is just an animation that does damage (among other things) so i could just derive from the base class one called "Magic" and just make instances of that. but that would limit me from making new or innovative spells ( if i would like spells to apply some effect, that would be another class derived from magic ), but again, seems too "reestricting" or maybe im being paranoid.

Is there a "standard" or some common approach to this kind of things ?.

Thanks in advance