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.