Gargantua

Gargantua (자간) is a demon that appeared in Season 3 Episode 10. And it's nickname is The Cursed Alchemist Monster.

Gargantua
Ghost Information
Name	The Cursed Alchemist Monster
Aliases	Golden Snake Ghost (Tensive Name)
Goal	Get the last gem eye to compete his finale form
Power and Abilities	Energy Detection Killing EyesFlightShield Creation Electric Shock
Weakness	None
Fate	Defeated by Gaeun Lee (Her creator)
Production
Voice Actor	Seongtae Park
Episode appearance	Episode 10
Season	3