Horn of the Unicorn [YGLD-ENA29] Common 1st Edition you can find them here

you can find them here in Ghosts From the Past

then target 1 Effect Monster your opponent controls

You can only use this effect of "Gouki Jet Ogre" once per turn

• If an "Abyss Script" Spell Card or effect is activated: You can Special Summon 1 Level 4 or lower "Abyss Actor" Pendulum Monster from your Deck

You can only use this effect of "Awakening of Nephthys" once per turn

Horn of the Unicorn [YGLD-ENA29] Common 1st Edition you can find them hereSet: King of Games: Yugi's Legendary Decks Card type: Equip Spell Rarity: Common The equipped monster gains 700 ATK and DEF. When this card is sent from the field to the Graveyard: Return it to the top of the Deck.