When you have no Spell/Trap Cards in your Graveyard, Normal Summon "Superheavy Samurai Wagon" and use its effects to add "Superheavy Samurai Soulpiercer" to your hand.

Then, activate the effect of "Superheavy Samurai Soulpiercer" from your hand to equip it to "Superheavy Samurai Wagon."

After that, Special Summon "Superheavy Samurai Trumpeter" from your hand and Synchro Summon "Superheavy Samurai Ogre Shutendoji" in face-up Defense Position!

By doing so, the effect of "Superheavy Samurai Ogre Shutendoji" will activate, destroying all of your opponent's Spell/Trap Cards. In addition, since "Superheavy Samurai Soulpiercer" was sent to the Graveyard, you'll be able to add 1 "Superheavy Samurai" monster from your Deck to your hand!

If you add "Superheavy Samurai Soulshield Wall" to your hand and Equip it to "Superheavy Samurai Ogre Shutendoji," it'll be able to attack with a DEF of 3700!