Advanced format ruling
Caius the Shadow Monarch
Card effect (current official text)If this card is Tribute Summoned: Target 1 card on the field; banish that target, and if you do, inflict 1000 damage to your opponent if it is a DARK monster.
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.