Your lack of rainbow is disturbing, how do you defend yourself? What makes you think you can run without the colors of a rainbow?
I like the idea of making Wintreath cooler, let the temperatures fall! Perhaps we should establish official seasons and tie in some seasonal areas and activities. (Wintreath may be locked in eternal winter, but there are bound to be slight changes throughout the year, yes?)
It eats its own heads and just grows more.
I'm not sure if it works like that...