I have different species of x-blood elves, tied to each element of 'nature'
So like, the four basic elements (Water, Earth, wind and Fire) and then the other elements (Like Light, Shadow, Lightning etc)
I haven't thought too much on this because only a few of the elf species are featured...
So, in this particular world-building exercise, when coming up with the five species/Races in this world, I basically equated humans to rats (rattus rattus, i.e, Black Rats), and drew analogies between other species to come up with most of the distinguishing traits which differentiate them from...
What array of creatures are in your world? Are there any unique ones, or mostly traditional? What kinds of beasts? What kinds of beings? What kinds of spirits? Are there any special quirks/differences you give your creatures? Are wizards their own species, or just anyone who can use wizardry, or...