When this card is Normal Summoned: You can add 1 "Ninjitsu Art" card from your Deck to your hand. When this card is Flip or Special Summoned: You can add 1 "Ninja" monster from your Deck to your hand, except "Ninja Grandmaster Hanzo".
The best Ninjitsu Art cards are the ones that can Special Summon high-leveled monsters. Hidden Village of Ninjitsu Arts can protect your Ninjitsu Art of Transformation. Armor Ninjitsu Art of Alchemy lets you recycle Ninjitsu Arts stuck on the field.
You can combo Ninjitsu Art of Mirage Transformation to Special Summon a high-leveled monster from your opponent’s graveyard. Then use Ninjitsu Art of Duplication to tribute that monster and swarm the field.