A quality 30 with lots of detail. Certainly some well used tropes here, but that works well in a 30. I like the inter-linkage between them that suggests the plots that could arise from using the lot of em.
No need to cloud fantasy with the practicalities of reproduction. There are many legends of creatures, gods, beings with clear genders being spawned from rocks, foreheads, and various other weird sources. Perhaps these dwarves did it the old fashioned way and got cursed/blessed into being tubers at a later point.