First, Normal Summon "Ninja Grandmaster Hanzo" from your hand, add "Ninjitsu Art of Super-Transformation" from your Deck to your hand, set it, and end your turn.

Then, activate "Ninjitsu Art of Super-Transformation" when your opponent Summons a Level 4 or higher monster and send that monster and "Ninjitsu Art of Super-Transformation" to the Graveyard to Special Summon "White Dragon Ninja" from your Deck!

As long as "White Dragon Ninja" remains face-up on the field, your Spell and Trap Cards cannot be destroyed by card effects, meaning "Ninjitsu Art of Super-Transformation" is less likely to be removed from the field!