Anubis uses this card during his Duel against Yami Yugi. He Special Summons this card after his "Pyramid of Light", "Andro Sphinx", and "Sphinx Teleia" were all destroyed. Anubis then activates this card's effect to increase its ATK tenfold. Yami Yugi then activates "Reverse of Reverse" to activate Kaiba's Set "Return from the Different Dimension" as his card, allowing Yami Yugi to Special Summon his banished Egyptian God Cards. Yami Yugi then combines the Egyptian Gods together to destroy this card and inflict infinite damage to Anubis, winning Yami Yugi the Duel.
"Theinen" (which Anubis pronounced "Thinien") had an unusual effect (In the dub, Anubis used his Pyramid of Light to feed his monster the souls of the mummies that Yugi, Tristan, Joey and Téa defeated inside the Millennium Puzzle, which were not even part of the Duel) and increased its original ATK (3500) tenfold (35,000).