I feel like doing Ninjas

[Lonk]

Shadow Ninja X
****
DARK
Warrior/Effect
ATK/1900 DEF/1400

You can Banish 1 "Ninja" monster in your Graveyard and Special Summon this card (from your hand). Once per turn; you can Banish 1 other "Ninja" monster you control and destroy 1 card on the field. If this card is removed from the field: Add all of your Banished "Ninja" monsters to your hand.

Frozen Ninja Grandmaster
******
WATER
Warrior/Effect
ATK/2500 DEF/1500

While you control 2 or more "Ninja" monsters: You can Special Summon this card (from your hand). If you do, this card cannot attack on the turn it was Special Summoned. Once per turn; target 1 monster your opponent controls. That monster's ATK is halved until the End Phase. If this card would be destroyed: Destroy 1 "Ninja" monster you control instead.

Hellspawn Ninja
******
FIRE
Warrior/Effect
ATK/2400 DEF/1600

You can discard 1 "Ninja" monster to Special Summon this card from your Graveyard. When this card is destroyed as a result of battle: Destroy the attacking monster and inflict 1000 damage to your opponent.

Ninjitsu Art of Summoning
Normal Spell Card

Activate only while you control a "Ninja" monster. Special Summon 1 Level 4 or lower monster from your Deck. It cannot attack or be removed from the field this turn.

Ninjitsu Art of Sealing
Quick-Play Spell Card

Activate only while you control a "Ninja" monster. Select 1 monster your opponent controls. It cannot be removed from the field this turn except by being destroyed by battle.