Which cases does your language utilize?

Here’s a list of the ones that I use:

Abbessive case
Diminutive case
Augmentative case
Ameliorative case
Pejorative case (made this one up)
Locative case
Causative case (which can also make agent nouns)
Vocative case

Accusative case
Dative case
Instrumental case
Exessive
Delative case
Translative case
Genitive case

The only cases I know I have are Genitive,Ergitive, and Absolute. I decided to go more with case like particals, but I haven't decided exactly Wich ones yet.

I'm sorry. I've been trying to look it up, but I still don't entirely understand what a case is in linguistics.