Sphere Kuriboh (Secret Rare) (SGX1-ENI12) - Speed Duel GX: Duel Academy Box 1st Edition

When an opponent's monster declares an attack: You can send this card from your hand to the GY; change the attacking monster to Defense Position. When you Ritual Summon, you can banish this card from your GY as 1 of the monsters required for the Ritual Summon.