Your search for "Cyberdark Keel LEDU-EN028" revealed the following:
Cyberdark Keel - LEDU-EN028 - Common - 1st Edition from Legendary Duelists 1st Edition, available at 401 Games Canada. Rarity: Common Card Text:If this card is Normal Summoned: Target 1 Level 3 or lower Dragon monster in your GY; equip...
Cyberdark Claw - LEDU-EN023 - Rare - 1st Edition from Legendary Duelists 1st Edition, available at 401 Games Canada. Rarity: Rare Card Text:If this card is sent to the GY while equipped to a monster: You can target 1 "Cyberdark"...