The Worms and their relationship to fire

Caveat: half formed idea but thinking about Sathar creatures and variants and revisiting them it occurred to me that 2 important types (Cybo dragon and cybo slug) were purposely redesigned to use fire. <div><br /></div><div>One has to ask why?</div><div><br /></div><div>The Sathar are covered in slime and leave a trail behind which isn't a great mix with fire. </div><div><br /></div><div>So why fire? Maybe fire actually scares them thus they view it as a penultimate weapon and engineer it into creatures. </div>