WereWyvern

By day, Alejandro guards the king in the guise of Chuckles the Jester, but by the light of the full moon he is revealed to be the Werewyvern. Bringing terror to the enemies of the crown through the power of his wyvern ancestry, Alejandro wields ThunderTalon, an ancient elven blade forged for his great-grandfather, the first Werewyvern.

This is for entry into the Seventh Sanctum "Weapons and Warriors" contest. The image was determined by random generator:

Character:
The intuitive, stressed, worldwise male half-Wyvern jester. He has a wide-chested build. His appearance is that of a normal human - but under certain conditions he turns into a member of his non-human ancestor's species.

Weapon:
This sword has a blade whose form suggests a talon. Its grip is of a green metal.