Lion Sword is the fifth main weapon in Warrior Within. This sword gives the Prince the ability to store up energy, and then unleash a more devastating attack. When enemies are hit by these charged attacks, if not dead, are knocked down, leaving them vulnerable.

It was given to the Prince by Kaileena(after activating the Garden Tower), and is the sword with which he fights her with(for the first time in the game). Kaileena cursed this sword in order to prevent the Prince from activating the Towers. Ultimately, the sword is broken after the Prince's battle with Kaileena, forcing him to seek out a new weapon (the Scorpion Sword).