Ninjago: Into the Dark

SYNOPSIS

The ninjas are welcomed to Shintaro by King Vangelis and Princess Vania, and Cole is accosted by a Geckle named Gleck, who is wearing a necklace that belonged to his mother. Princess Vania leads Cole to a mountain tunnel, and they stumble upon an underground mining operation where Geckles and Munce are being forced to dig by an army of skeleton warriors controlled by the vicious Skull Sorcerer.