Three letters make up my name, I twist, I slide and slither all the same. In rivers or oceans I wriggle with ease, What am I that moves as I please?

Up and down, top and side. Not big but small, rolling right along

I guard the fields with a prickly stare, Purple crowns upon my hair. Ignored by hands, yet bold and brave, I flourish where the wild things wave. Touch me wrong and you’ll soon see- What thorny symbol could I be? Want it harder, shorter, or with a mythicalhsymbolic twist?

Your ride or die as you need With horns or wings, I am a mythical being From medieval times to the wild west I was amomg the very best

Most often one blue and one brown, but other combinations can be found. Aristotle was the first to describe this, famous was Anastasius the first, dubbed dikoros. Another was Goethe, and here I’ll leave ya.