"The dragon was hoarding sheet music, and doing its darn best to play the comically undersized instruments it’d stolen to go along with them." -- Gallifreya
Sir Greenbaum edged into the dragon's cavern. Dragons were always tricky business. A kingdom with one in its realm proceeded with caution. Those who sent a Princess had to be certain of both the princess and the dragon. And as for this realm... well... their Princess still needed a wetnurse.
So they sent a knight. Specifically, they sent him. Kingdoms were overflowing with little boys wanting to be knights, young men training to be knights, and knights themselves. Apart from the expense of armour, knights were relatively expendable. Sir Greenbaum had long since decided that he would not expend himself needlessly.
This was why he painted his armour to blend more easily with the scenery. Why he silenced the soles of his metal boot with strips of bark. And why he managed to survive all his encounters with dragons, so far. He had to make it out every time. The dragons only had to beat him once.