Castle Mountain

The Castle Mountain is home to the wicked Youkai Empire and an eponymous location in the The Phantom's Apprentice.

Castle Mountain is a huge hollow mountain surrounded by a moat-like lake of lava which indictates the mountain iitself is a volcano. It is connected by a gondola lift a boiling moat of lava between a nearest plateau on the mountain's lower heights and a hollow cave that is Hades' secret domain inside the mountain. It is located far away from the Raven Tavern. It is where Youkai Empire schemed and planned.