Sphere Kuriboh [SS04-ENA15] Common

Set: Speed Duel: Match of the Millennium Card type: Effect Monster Rarity: Common Attack: 300 Defense: 200 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.