Card Rulings:Fusion Sage

TCG Rulings

 * You cannot activate "Fusion Sage" if you do not have any copies of "Polymerization" in your Deck.

OCG Rulings

 * If you have no copy of "Polymerization" in your Deck, you cannot the effect of "King of the Swamp", and you cannot activate "Fusion Sage".

Mentions in Other Rulings

 * When "Thunder King Rai-Oh" is face-up on the field, you cannot activate "Terraforming", "Reinforcement of the Army", etc.