- "This sword is not well-known, it's history lost to time. According to here-say and legend it contains unimaginable power."
- —Unknown
This is a secret weapon the Prince can obtain at the end of Warrior Within.
Biography
The Prince can obtain it by activating all the nine life upgrades. Each life upgrade, once activated, sends a process through the hourglass chamber which allows one out of nine digits forming a circle to glow white. When all the life upgrades are activated and the digits forming the circle glow, the chamber opens a pit in the middle of the circle, and the Water Sword rises out.
This is the most powerful sword in Warrior Within, easily finishing off normal Brutes with less than ten hits and the only one strong enough to kill the Dahaka, and when near it the sword starts to glow blue. Just like the Lion Sword and the Scorpion Sword, it is capable of storing up energy for devastating attacks and similar to the Scorpion Sword, it is capable of breaking cracked walls.
Although the sword is available to the ones who has obtained all the nine life upgrades, the players who have got all the upgrades can prevent taking the Water Sword by not stepping into the circle, allowing the player to fight Kaileena with all nine life upgrades.