Tengu format ruling
Cyber Dragon
Card effect (current official text)If only your opponent controls a monster, you can Special Summon this card (from your hand).
Rulings
- This card's Summon does not start a chain, so "Thunder King Rai-Oh" can be chained to it.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.