Armor Ninja
Yu-Gi-Oh! archetype · 6 cards
Air Armor NinjaORCS-EN014 · Order of Chaos · +2 printings
Aqua Armor NinjaORCS-EN015 · Order of Chaos · +2 printings
Blade Armor NinjaORCS-EN041 · Order of Chaos · +1 printing
Earth Armor NinjaORCS-EN016 · Order of Chaos · +2 printings
Flame Armor NinjaORCS-EN013 · Order of Chaos · +2 printings
Number 12: Crimson Shadow Armor NinjaORCS-EN042 · Order of Chaos · +3 printings
Archetypes from YGOPRODeck and YAML Yugi (Yugipedia).