User blog comment:Lightning the Skrill/Snow Wraith Frost?/@comment-25863920-20150710114042

No idea about the first one but about the second one.

Well, even our body is not warm enough for "using" the food we eat , so the catalyst "allow" the process to be done in 37 degress rather than 70 which is optimal , I guess.

Now lets say this dragon has an improved version that allows the process to be done in -5 (for example)

There might be another problem though, with blood turning into ice-blood in the veins which has probably been solved with adding some extra salt/other salts to the blood to decrease the temperature of turning-into-solid (Im not a native speaker)

Overall, my opinion is to ignore these and watch the movie.