as a GM I feel like any day when you get to write phrases like:
"A furnace-blast of red-black flames blasts and broils towards them as the Dragon reflexively reacts..."
"...the Dragon transforms into a hurricane of doom and fury and death – one cluster of dwarves are struck, whip-like, by its serpentine tail and cast down the mountainside; one mighty clawed foot descends upon another cluster to crush or impale them; the great fanged maw snaps forward on its long neck to menace another cluster and potentially catch several within the cavernous jaws.
"...and it is forced to depart with one last spray of corrosive black bile as a parting shot that in the parties current state of health may well be enough to finish them off!"
is a pretty damn good day. heads-up, children I'm GMing for tomorrow - Smaug the Terrible ain't got nothing on my wyrm.