I love it, I still think it's hilarious to think that fantasy depictions of characters seem to go a bit like "fighting a fire breathing dragon? allow me to get my skirt and proceed to cover NOTHING on myself." but really, awesome work.
two dragonslayers and three heads, not good odds unless that dude way in the background on the right is an ally. The middle one has the archer's attention, I think the scythe dude sees the left head preparing to attack the archer, but the right head seems determined to block his path.
Amazing motion and action. The dragon heads are a fascinating mix! I really like the detail of the glow showing through the throat of the one that is breathing fire, as though you can see the ignition of gasses through a somewhat stretched membrane. Even better you maintain the focus of the composition with so many figures and motion.