Something like story:
Depending on your race the story should be a bit different, but anyway
The town of "Rubrum Astrum" (this is just some random stuff, Red and Star in Latin) has stood many centuries under the Tree of Life, that grows over the Grave of Divines, the world that used exist before this one. Under the Tree of Life in the Grave of Divines, there are numerous dungeons and caves, inhabited by different creatures. Undead, dwarfs, elven people, orcs, trolls, goblins, kobolds, forest creatures of many kinds, etc. The closer you get into the core of the Grave of Divines the more ruins of the old world you will see. As the time passes, many heroes and villains have ventured to core of the Grave of Divines returning with wealth, immortality and powers beyond normal human's strength. Now it's your time venture to the very core of Grave of Divines and claim power's beyond your imagination.
And here are some ideas that I have now:
- Surface level for a town
Many dungeon branches and planes to visit
Objective would be finding an artifact or something and returning to your starting town.
Different starting areas for races
Some race only classes
Boss monsters
Subraces
Advanced Classes (Maybe.. Something like choosing a class and then advancing to another class) (Warrior -> Berserker, Warrior -> Knight or something?) Some ideas on this maybe?
Racial specialties: like different ways of eating (Vampires drinking blood from corpses, Carnivore and herbivore races)
Crafting
- Human
Undead
Animal
Dwarf
Elf
Monster
Demon
Divine
And I'm also gathering some ideas to refine this to a module. Feel free to comment on my ideas and share your own and thanks for reading this and ignoring my bad grammar.