Obsidian Weapons

The Obsidian Weapons a set of powerful weapons in the world of Ninjago. They appear in LEGO Ninjago: Shadow of Ronin.

Appearance
The Obsidian Weapons appear physically identical to the Golden Weapons, although the former has a pair of sais instead of shuriken. Each weapon's handle features golden parts, while obsidian is used on the blades of the Sword and Sais, the chain of the Nunchucks and the teeth of the Scythe.

Shadow of Ronin
After the Ninja lost their memories (and thus, lost their True Potential) they were later told that they needed to obtain the Obsidian weapons to recover their memories. They first go to the Toxic Bogs, where they fight through Venomari to get a special berry required to make the Tea of Insight, showing each of the Ninja the location of their Obsidian Weapon.

The Ninja first proceed to the Caves of Despair to get Cole's Obsidian Scythe. After escaping, they proceed to the Fire Temple, where they search for Kai's Obsidian Sword. Next they head to the Frozen Wasteland for Zane's Obsidian Sais. After a brief interruption by the return of the Nindroids in Ninjago City, they go to the Floating Ruins to collect Jay's Obsidian Nunchucks. With their powers restored, they begin their quest to stop Ronin.