ninjago season 2 ep 18 part 2 "The Darkness Spreads”

Malachar and Vexor travel to an ancient mountain and discover a special resting place for the artifacts. They place the artifacts into the stone platform, awakening their combined power. Dark energy spreads across the mountain, and black clouds cover the sky above Ninjago. Meanwhile, Kai, Jay, and Cole see the darkness spreading and realize that Malachar's plan is working. They rush toward the mountain, determined to stop him before the entire world falls into darkness.