"Dragon Ninja" (竜（りゅう）の忍者（にんじゃ） Ryū no Ninja) is a sub-series of "Ninja" monsters consisting of only four members. Despite being "Ninja" monsters, members of this series are not the traditional Warrior-Type. Instead, they are Dragon, Sea Serpent, Winged-Beast, and Beast-Type, allowing them to be Special Summoned by "Ninjitsu Art of Super-Transformation" or "Ninjitsu Art of Transformation". All four members of this series are based on their masked counterparts (known as "[Color] Ninja" in Japanese), and each appears to wield a different golden-colored Japanese weapon.