From Homestar Runner Wiki
In addition to hypothetically eating sheep, the dragon has several other functions which are selected by hitting certain areas of its chest with a spear. These include:
- Pots n pans
- Tumble dry
- Instant death
The Knight believed that the dragon's "sanitize" setting would be strong enough to incinerate The Poopsmith's stench. However, he accidentally set the dragon to "instant death", which killed the dragon.