Death Wyvern
From DALpedia
Death Wyverns are wyverns enchanted with Dark Magic. They are evil and extremely powerful. They have abilities similar to the Dark Dragon yet are much more powerful.
Death Wyverns useally are servants of evil dark rulers or claim the domain of an area tainted by shadow energy. One Death Wyvern was known to have lived in a cavern in the subterranean world of Mizar and a mission with the current High General of the subterranean division was sent to defeat the creature. High General Van'deln's son Gorus was also in that battle. Gorus was able to kill the death wyvern, yet his father also fell in the battle. Gorus is now able to transform into a Death Wyvern, with his gepardi magic.