1) adventure creation mod. A mod that makes it easier for a user to create their own oneshot
2) Dark sun mods. Add races or monsters.
3) End game monster transfroamtion. The game allows you turn into a mindflayer. The same but turning into a lich, a vampire, a werewolv, a demon, an avangion etc.
4) Add Avangions. They are fantastic.
5) Add a spider pet.
6) a magic wand that can cast enlarge several times pe rround making some of your allies MASSIVE.