Advanced format ruling
Iron Chain Coil
Card effect (current official text)Once per turn, you can select 1 "Iron Chain" monster you control to have it gain 300 ATK and DEF as long as this card is face-up on the field.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.