One of
The Twelve Swords.
The Sword of Heroes
Symbol: a winged dragon
Dragonslicer, as a weapon, is not much different from other swords. Except, that is, when it is employed against a dragon. In this case, it will guide its bearer to the creature's heart, slicing through dragon scales with ease. Dragonslicer is also as effective against the giant worm forms of the dragon.
Dragonslicer, Dragonslicer, how d'you slay?
Reaching for the heart in behind the scales.
Dragonslicer, Dragonslicer, where d'you stay?
In the belly of the giant that my blade impales.