Your search for "Iron Chain Coil CSOC-EN020" revealed the following:
Iron Chain Coil - CSOC-EN020 - Common - Unlimited from Crossroads of Chaos Unlimited, available at 401 Games Canada. Rarity: Common Card Text:Once per turn, you can select 1 "Iron Chain" monster you control to have it gain 300 ATK...
Iron Chain Coil - CSOC-EN020 - Common - 1st Edition from Crossroads of Chaos 1st Edition, available at 401 Games Canada. Rarity: Common Card Text:Once per turn, you can select 1 "Iron Chain" monster you control to have it gain...