[Dark Thorn, ATK 2000]
"My 'Eye of Darkness' has another Monster Effect," Darkness said. "While Eye of Darkness is On the Field in Attack Position, I can Normal Summon one Tribute Monster from hand without a Tribute. Therefore, although Dark Thorn is a level six Monster, it can be Normal Summoned without a Tribute."
Darkness had a total of five Set Cards in his Back Row. Three of them had originally been activated last turn—"Nothingness," "Infinity," and "Darkness 1." But those three cards had now been covered again, returning to their set state.
This was another effect of the Field Spell "Darkness." As long as Darkness was On the Field, during each End Phase, all face-up Spell/Trap Cards on the controller's Field returned to being set.
Moreover, the positions of the five Set Cards would be randomly shuffled again, and the controller could not inspect them freely.
But both sides knew that Darkness had surely checked and confirmed the positions of the Set Cards in his Back Row. He knew exactly where each of his Set Cards was.
As long as "Eye of Darkness" was On the Field, Darkness could inspect his own Back Row whenever his opponent summoned a Monster in any form.
And at the end of the previous turn, Kaiba had summoned "Blue-Eyes White Dragon" through the effect of The White Stone of Ancients. At that time, Darkness had gotten another chance to confirm the positions of his Set Cards.
"Dark Thorn, huh? Even if it's a Tribute Monster, something like that can't defeat my Blue-Eyes," Kaiba said. "Come on, then. Let me see what else your traps can do."
"Gladly."
Speaking coldly, Darkness activated his trap chain once more.
"I activate the Continuous Trap 'Nothingness,' then the Continuous Trap 'Infinity.'"
Nothingness and Infinity, whose