The Rekka-Ken, (烈火剣 Raging Fire Sword), is the most powerful weapon in Onimusha 2: Samurai's Destiny, and the final weapon that Jūbei acquires and is found after he beats the final floor of the Purple Phantom Realm. The two handed sword has the power of fire and is the ultimate elemental weapon, dealing the most damage possible with each hit; it's fire magic attack is capable of destroying any enemy in the game with the exception of bosses.
Though powerful, the only drawback is that the weapon is heavy and has a relatively slow attack speed.
Trivia
- This is the only secret weapon which isn't imbued with a "special" element like the Bishamon Sword or the Ultimate Whip.