Best "smaller" magic mods?

Hi, I've wanted to get into Minecraft again recently after a ~2 years pause and I'm trying to set up a vanilla+ modpack so I'm quite out of the loop regarding the modding scene. I wanted to add some magic/fantasy mods too, but nothing too "big", like, modpack scale things. Maybe mods that add a couple of features (for example I remember one that added necromancy and nothing else). Ik it's a stupid question but do you have any suggestions? The version is 1.21.4 (although mods for 1.21.1 are good too)