For a different story that's in the works, introducing my design for a Poison Type Eeveelution along with a new story character! \OwO/ Though it's one that has TECHNICALLY been seen in one of my stories before, just not like this-
Appropriately, I decided to name her Cyanide (self-explanatory xD) and name the species Latrodeon, from Latrodectus (the genus which the black widow and other true widows belong to :3) eon.
Now about the design! \^w^/ Gave her four eyes so that her default appeareance is already linked to spiders, ears with a shape resembling scorpion stingers, of course a nice sharp pair of fangs for some nasty venomous bites and a rattlesnake tail which probably also doesn't need any further explanation. The yellow rings on the forehead and around the tail are in reference to how Umbreon used to originally be intended to be a Poison Type Eeveelution. Since having eight legs by default made the design a bit too "crowded", I made it so that four spider-like legs come out specifically during battle, making for a total of eight legs after all. :D Only Venenumian Eevee can evolve into this evolution, and they can't evolve into anything else, a requirement being to be inside a host for a longer period of time and then levelling up. Oh yeah that thing's a parasite, can turn all goopy too, which is how getting into a host in the first place is possible for it and its pre-evolution- Though it's very, very rare for Venenumian Eevee to evolve into this, since the reason for the parasite behavior is them feeding on the host's life energy which... usually kills the host pretty soon. xD