Lightining: toothless. fire: hookfang (from httyd)

Fire: Scorpion

Lightning: Raiden

Poison: Reptile

Ice: Sub-Zero

Lighting: Thor

Ice: Frozing breath

Poison: Toxic / Toxicity

Fire: Odin

Smaug

N my Viking era Eitur- poison.

Spyro

Poison: Taco Bell, Venom, My ex