Armor Ninjitsu Art of Freezing
Continuous TrapWhen an opponent's monster declares an attack, if you control a "Ninja" monster: You can flip this card face-up; negate that attack and end the Battle Phase. While this card is face-up on the field and you control a "Ninja" monster, monsters your opponent controls cannot change their battle positions.
Armor Ninjitsu Art of Rust Mist
Continuous TrapWhen a monster(s) is Special Summoned to your opponent's field, if you control a "Ninja" monster: Halve the current ATK of that Special Summoned monster(s).
Ninjitsu Art Notebook
Continuous SpellOnce per turn: You can send 1 "Ninja" monster from your hand to the GY; Set 1 "Ninjitsu Art" Spell/Trap directly from your Deck, except "Ninjitsu Art Notebook".
Ninjitsu Art of Dancing Leaves
Continuous TrapActivate this card by targeting 1 "Ninja" monster or 1 face-down Defense Position monster on the field; Tribute it, and if you do, Special Summon 1 "Ninja" monster from your Deck. When this card leaves the field, send that monster to the GY. You can target 1 "Ninjitsu Art" Continuous Spell/Trap in your Spell & Trap Zone; return it to the hand. You can only use 1 "Ninjitsu Art of Dancing Leaves" effect per turn, and only once that turn.
Ninjitsu Art of Decoy
Continuous TrapTarget 1 face-up "Ninja" monster you control; it cannot be destroyed by battle.
Ninjitsu Art of Duplication
Continuous TrapTribute 1 "Ninja" monster; Special Summon any number of "Ninja" monsters from your Deck, in face-up Attack Position or face-down Defense Position, with combined Levels less than or equal to the Level of the Tributed monster. When this card leaves the field: Destroy those monsters.
Ninjitsu Art of Mirage-Transformation
Continuous TrapTribute 1 "Ninja" monster, then target 1 monster in your opponent's GY; Special Summon it to your field. It is also treated as a "Ninja" monster while this card is face-up on the field. When this card leaves the field, send that monster to the GY. You can only activate 1 "Ninjitsu Art of Mirage-Transformation" per turn.
Ninjitsu Art of Shadow Sealing
Continuous TrapTribute 1 "Ninja" monster to target 1 monster your opponent controls; banish that target. While that card is banished, its Monster Card Zone cannot be used. When this face-up card leaves the field: Return the card banished by this effect to the same Monster Card Zone, in the same battle position.
Ninjitsu Art of Super-Transformation
Continuous TrapActivate this card by targeting 1 "Ninja" monster you control and 1 face-up monster your opponent controls; send them to the GY, then Special Summon 1 Dragon, Dinosaur, or Sea Serpent monster from your Deck whose Level is less than or equal to the combined original Levels of the sent monster(s). When this card leaves the field, banish that monster.
Ninjitsu Art of Transformation
Continuous TrapActivate this card by Tributing 1 face-up "Ninja" monster; Special Summon 1 Beast, Winged Beast, or Insect monster from your hand or Deck whose Level is less than or equal to the Level the Tributed monster had on the field +3. When this card leaves the field, destroy that monster.