Cockatrice [Unlimited Edition] 015 Set: Diamond & Pearl: Mysterious

Set: Diamond & Pearl: Mysterious Treasures Type: Grass Rarity: Holo Rare Retreat cost: Colorless

Set: Sun & Moon: Unbroken Bonds Type: Psychic Rarity: Secret Rare Retreat cost: Colorless

At the beginning of your next upkeep

the player can activate mana abilities only if they're from lands that player controls and only if mana they produce is spent to activate other mana abilities of lands the player controls and/or to play that card

Set: World Championships 2013 Type: Psychic Rarity: Rare Retreat cost: Colorless

Cockatrice [Unlimited Edition] 015 Set: Diamond & Pearl: MysteriousSet: Unlimited Edition Type: Creature Cockatrice Rarity: Rare Cost: {3}{G}{G} Flying Whenever Cockatrice blocks or becomes blocked by a non Wall creature, destroy that creature at end of combat.