Crystal Beast Emerald Tortoise

Type: Effect Monster
Monster Type: Aqua
Attribute: Water
Level: 3
Attack: 600
Defense: 2000
Rarity: Common

Description: Once per turn, you can change 1 of your monsters that attacked this turn to Defense Position. If this card is destroyed while it is in a Monster Card Zone, you can place it face-up in your Spell & Trap Card Zone as a Continuous Spell Card, instead of sending it to the Graveyard.