@Hollowfox the Stallion
Because she wasn’t “made of magic” like the MHC, with the implicating the floating was a necessary part of their biology, though with magic being destroyed Ponyhead likely wont be able to use magic with her horn such as creating magical blasts.
Same with Tom, where while he wouldn’t be able to incant spells, as a demon he may or may not be able to still use fire? Him “existing” would would still make at least some sense.