In episode 6, Tenzen Yanagi uses this card during his Ground Duel against Bolt Tanner. He Normal Summons this card in Defense Position. Yanagi then equips this card with "Spirit Mask". Later "Giant Ushi Oni" attacks and destroys this card. The effect of this card then activates, inflicting 2000 damage to Yanagi. The effect of "Spirit Mask" then activates, forcing Yanagi to send "Triangle O" from his hand to the Graveyard.
This card is also shown when Yanagi shows off his cards to Yusei.
Yanagi drops this card after "Giant Ushi Oni" attacks directly.
In episode 7, Yusei Fudo uses this card during his Ground Duel against Bolt Tanner while the former was using Yanagi's Deck. He Normal Summons this card in Defense Position. Later "Giant Ushi Oni" attacks this card, but Yusei activates "Totem Pole" to negate the attack. Tanner then activates "Spiderweb Castle" in response to the activation of "Totem Pole". On the final turn of the Duel, Yusei activates "Triangle O" to destroy all cards on the field and inflict all effect damage he would take this turn to Tanner instead. The effect of this card and the second effect of "Cabrera Stone" then activate, which would inflict 2000 and 1000 damage to Yusei respectively, however the effect of "Triangle O" redirects the damage to Tanner instead and this wins Yusei the duel.
This card is also shown when Yanagi shows Tanner his cards a second time.