Tengu format ruling
Non-Fusion Area
Card effect (current official text)Neither player can Fusion Summon.
Rulings
- You cannot activate "Power Bond", "Miracle Fusion", or "Dragon’s Mirror" when this card is active because they are treated as Fusion Summons. You can activate "Fusion Gate", but you cannot activate its effect.
- You can still Special Summon a Fusion Monster with a card effect like "Metamorphosis" or "Cyber-Stein".
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.