- In episode 89, Zane Truesdale uses this card during his Duel against Atticus Rhodes. After he summons this card, Zane activates this card's effect to take "Red-Eyes B. Chick" from Atticus' Graveyard and equip it to this card, increasing this card's ATK by the ATK of "Red-Eyes B. Chick". Zane then equips this card with "Megamorph", doubling this card's original ATK since Zane's Life Points are lower than Atticus'. This card then attacks "Red-Eyes B. Dragon", but Atticus activates "Negate Attack" to negate the attack. Later "Red-Eyes Darkness Dragon" (whose ATK was 2700 due to its own effect) attacks this card, but Zane destroys "B. Chick" to prevent this card's destruction, however Zane still takes Battle Damage. On Zane's next turn, he switches this card to Defense Position. On the last turn of the Duel, Zane activates "Polymerization" to fuse this card with "Cyberdark Edge" and "Cyberdark Keel" in order to Fusion Summon "Cyberdark Dragon".
- In episode 95, Zane uses this card during his Duel against Syrus Truesdale. He summons this card via "Quick Summon". Zane then uses this card's effect to take "Infernal Dragon" from his Graveyard and equip it to this card, increasing this card's ATK by the ATK of "Infernal Dragon". This card then attacks directly, but Syrus activates "Life Force" and uses its effect to negate the Battle Damage. On Zane's next turn, this card attacks "Submarineroid", but Syrus activates "Cyber Repairer" to prevent his monster from being destroyed by battle this turn. Zane then explains that due to this card's effect, it will inflict Piercing Damage when it attacks a Defense Position monster, but Syrus uses the effect of "Life Force" to negate the Battle Damage. On Zane's next turn, this card attacks and destroys "Submarineroid", but Syrus uses the effect of "Life Force" to nullify the piercing damage that this card would have inflicted to him. On the last turn of the Duel, Zane activates "Warp Beam" to allow this card and "Cyberdark Keel" to attack directly this turn at the cost of making the ATK of this card and "Cyberdark Keel" 600 this turn. Zane then uses this card and "Cyberdark Keel" to attack directly, but Syrus uses the effect of "Life Force" twice to negate the damage he would take. "Cyberdark Edge" then attacks directly via its own effect, but Syrus uses the effect of "Life Force" to nullify the Battle Damage. Zane then activates "Flash Fusion" to fuse his three Cyberdark monsters together and Fusion Summon "Cyberdark Dragon". Zane then uses the effect of "Cyberdark Dragon" to equip "Cyber End Dragon" onto "Cyberdark Dragon" and increase the latter's ATK by the ATK of "Cyber End Dragon". "Cyberdark Dragon" then attacks "Pair Cycroid", but Syrus activates "Emergency Provisions" to send "Mirror Damage" to the Graveyard and gain 1000 Life Points. Since "Mirror Damage" was removed from the field, "Pair Cycroid" is destroyed. A replay occurs and Zane uses "Cyberdark Dragon" to attack directly, but Syrus uses the effect of "Life Force" to negate the Battle Damage he would take. Zane then activates "De-Fusion" to return "Cyberdark Dragon" to his Extra Deck and Special Summon this card, "Cyberdark Edge", and "Cyberdark Keel" from his Graveyard. All three of Zane's monsters then attack directly, winning Zane the Duel.
- In episode 128, Zane uses this card during his Duel against Jesse Anderson. He activates "Polymerization" to fuse this card with "Cyberdark Edge" and "Cyberdark Keel" in order to Fusion Summon "Cyberdark Dragon".
- In episode 137, this card is shown in a flashback Zane has when he reminds Syrus on the latter Dueling him, so he could bring him back to his original self.
- In episode 163, during Zane's Duel against Makoto Inotsume, Zane sends this card from the top of his Deck to the Graveyard via the effect of "Power Wall".
- In episode 164, Syrus uses this card during his own duel against Makoto. He sends this card from the top of his Deck to the Graveyard via "Power Wall". Later Syrus activates "Cyberdark Impact!" to return this card, "Cyberdark Edge", and "Cyberdark Keel" to his Deck and Fusion Summon "Cyberdark Dragon". On the last turn of the duel, Syrus activates "Remove Bomb" to banish this card, "Cyberdark Edge", "Cyberdark Keel", "Polymerization", and "Mystical Space Typhoon" from the top of his Deck and inflict 900 to Makoto (300 damage for each monster banished this way). After Syrus activates "Spell Economics", he activates "Dimension Fusion" to Special Summon this card, "Cyberdark Edge", and "Cyberdark Keel" from the Banished Zone. Syrus then activates "Power Bond" to fuse his three Cyberdark monsters together and Fusion Summon "Cyberdark Dragon".
- This card can also be seen at the bottom of Zane's Deck when he explains to Syrus that his Deck wants him to go on despite his condition.
- This card is also shown when Syrus practices using Zane's Deck. Right after he receives a shock from his body, Syrus places this card back into his Deck.
- This card is also shown in a series of flashbacks Syrus Truesdale has when he deduces that Zane's problems came from his Deck, not the underground Dueling he was involved with.
- This card's attack is called Dark Spear.
- In the anime, "Cyberdark Horn" can equip a Level Four or lower monster, as opposed to the TCG effect, which can only equip a Level Three or lower. It could also equip monsters from either player's Graveyard.