Gem-Knight Aquamarine

[ Aqua / Fusion / Effect ] "Gem-Knight Sapphire" + 1 "Gem-Knight" monster Must first be Fusion Summoned with the above Fusion Materials. If this card attacks, it is changed to Defense Position at the end of the Battle Phase. If this card is sent from the field to the GY: Target 1 card your opponent controls; return that target to the hand. ATK/ 1400 DEF/ 2600