Races are really accessories in Dungeon World. How can you translate more potent races (or race features) from other settings to Dungeon World?
For instance I'm trying to make an Eberron game using Dungeon World (I think the sytem would work really well for the setting) but when it comes to advantages and new races with special abilities I'm not sure how to proceed.
Changelings can disguise themselves at will into non-specific individuals. I shouldn't give them a level 6-10 thief ability for free that would be too much I think. So what can I do? Create a new move for the changeling saying that they can pass as any other race? Making the disguise more for specific disguise situation?
What about Warforged that don't need to sleep and eat etc. How do you handle it and what's the point for other characters to not take it. How do you balance those choices.
I'd like to add Dragonmarks as well but they are really powerful gifts. Should I create a "race" called Dragonmarked and say that you are simply a dragonmarked version of another (valid) race?
What about Drows in Forgotten Realm? How would you translate their ability to create shadows? All moves? But how does free moves like this balance in the game mechanics?
Related question: Playing Dungeon World in an established setting