: After navigating the dangerous Storm Belt in the Hydro Bounty , the Ninja reach the island and warn the Keepers' leader, Mammatus, of Kalmaar's impending invasion.
: Created before Ninjago, these amulets allowed the serpent Wojira to command the elements of Wind and Storm .
: Prince Kalmaar, who had been eavesdropping, destroys the controls of the Hydro Bounty , leaving most of the Ninja team stranded while he heads to Ninjago City to retrieve the real artifact. The Storm Amulet Lore