Heartfels

named for the rock hornfels, which is the singular form of the word a marbled turquoise and leaf green mineral. If the entryway to an enclosed space is carved entirely from this soft stone (post, lintel, and threshold all), a fairy can attune to it. Thereon out, any individual who knocks thrice against the hearthfels entrance with the intent of entry will be shrunken down to match the size of the fairy attuned to the dwelling (if they are already smaller, they won't be shrunken down). Hearthfels is almost exclusively found in the Court of the Meridies, the Epochal Court, and the mini-faywilds.