Hail Hydra?

they are both bad but at least I may be able train one to destroy there other... can all the heads breath fire or do one breath ice

I've never heard of an ice breathing hydra, but you never know. oO;

they are still dragons.

this dragon shoots plasma beams

I didn't know hydras even breathed fire

I saw that there is going to be a How You Train Your Dragon 3

some breathe fire, some breathe ice (which is basically the same thing if you consider it. I mean, heat and cold. both require insulation? No?)

I've also heard of a few that spit acid? Dunno... So many versions of hydra's around...

Fire requires ingesting limestone according to Flight of Dragons. lol But there's a difference in how they could produce either fire or ice.

It all depends on the dragons, the myths or the writer.

Limestone is a perfectly good form of insulation. It's good for keeping heat/cold out or warmth in. Which is why it was often used for housing in the past!

I don't think it was limestone. They just called it "firestone" and I got the impression it was some sort of coal -the fuel rather than the insulation...