Superheavy Samurai Commander Shanawo

[ Pendulum Effect ] 
When an opponent's monster declares an attack: You can Special Summon this card, then if you have no Spells/Traps in your GY, change that opponent's monster's ATK to 0, also negate its effects. You can only use this effect of "Superheavy Samurai Commander Shanawo" once per turn.

[ Monster Effect ] 
1 Tuner + 1+ non-Tuner monsters
This card can attack while in face-up Defense Position. If it does, apply its DEF for damage calculation. Once per turn, during the Battle Phase, if you control this Synchro Summoned card (Quick Effect): You can Special Summon 1 "Superheavy Samurai" Monster Card from your GY or face-up Spell & Trap Zone, then you can place this card in your Pendulum Zone.