Activate 1 of these effects (but you can only use each effect of "Layer 19: "Preventing the Invasion! The Pitch-Black Super Quantum!!"" once per turn); ● Target 1 Attack Position monster on the field; change it to Defense Position. ● If you control a "Super Quant" monster: Special Summon 1 "Super Quant" monster from your Deck in Defense Position, with a different original Attribute from the monsters you control. ● Set 1 "Super Quant" Trap from your Deck. It can be activated this turn.