Superheavy Samurai Scarecrow

1 "Superheavy Samurai" monster Cannot be used as Link Material. While you have no Spells/Traps in your GY, you take no battle damage from attacks involving this card. If you have no Spells/Traps in your GY: You can discard 1 monster, then target 1 "Superheavy Samurai" monster in your GY; Special Summon it to your zone this card points to, in Defense Position. You can only use this effect of "Superheavy Samurai Scarecrow" once per turn.