|Luigi's Beam Sword|
Luigi's Beam Sword is a beam sword that has a green glow with a white core.
In "Act II Part 4," Luigi, whose body was taken over by Nox Decious and became Mr. L, used his beam sword to battle Mario, but his beam sword had changed. Luigi's beam sword then had a black core, green glow, and was called the Dark Emerald Blade. Once Luigi fought back and regained control of his body, the beam sword returned to normal.
Normally, Luigi's Beam Sword does not possess any noticable abilities when compared to other beam swords. However, when wielded by Mr. L, The blade was able to absorb fireballs and fire them back at the attacker. It is unknown if this was a normal ability of the beam sword, or if the ability was the result of Nox Decious' power augmenting it.
- The Dark Emerald Blade was never actually called such in the series.