Obsidian Sword

The Obsidian Sword of Fire is one of the Obsidian Weapons of Ninjago. It was used by Kai.

Power
The Obsidian Sword is able to engulf its blade in flames and shoot fireballs at enemies or objects.

Shadow of Ronin
During the Ninjas' quest to defeat Ronin, the ninja head to the Fire Temple to retrieve the Obsidian Sword of Fire.

Trivia

 * The Obsidian Sword resembles the Sword of Fire.