RPGMemes

That's a really cool concept! But one of my design choices was to stick to D&D5e-compatible races in case I want to run a campaign in-world

So I needed in-world reasons why orcs and elves could hybridize with humans, but the other races couldn't. For example, a human could participate in the creation of a dwarf, and it would contain part of their soul and be as much their child as its other parents', but the result wouldn't be a half-dwarf, it'd just be a dwarf =)