This started as a bit of a injoke between a friend and myself, and it turned into an entire series for itself, known as Elemental Unicorns.
Elements are a wide concept in itself. In this case, we have a Lava unicorn. Despite their fiery element, Lava unicorns are the most... relaxed? of unicorns. They like humans, and will often try to sneak into camp sites to raid possible food storages, or take a nap in a firepit. Campers in some places will complain over the sulfur smell from the unicorn's mane and tail.