Poison: Nuclear
Wyvern
The Wyvern is a highly sought-after massive flying dragon that can overpower most creatures it faces. The deadly Wyvern, which is only tamable by stealing and raising as a baby, can be found in four varieities — Fire, Ice, Lightning, and Poison — each of which have distinct attacks.

Name ideas for your Wyvern from ARK players.
Poison, Sting
Dust Devil if brown
Drake Dragon
Magma
Lightning:Chidory/lightning blade
Tempest for lighting
Male fire: Cinder Female Fire: Cindy
Dragco mouthfire
Poison wyvern: bad breath Monday
Fume, if it's a poison.
(If fire) inferno(R.I.P.😭😭😭😭)
Saphira
Toothless
Smaug
Draco
Rathalos
Lightning:ARK-Flash
If female poison, MILKERS
Lightning: Lazarbeam
If black Deathwing
If any type: Jeff
If fire Natsu or Igneel